Azure subscription and service limits, quotas, and constraints

This document lists some of the most common Microsoft Azure limits, which are also sometimes called quotas.

To learn more about Azure pricing, see Azure pricing overview. There, you can estimate your costs by using the pricing calculator. You also can go to the pricing details page for a particular service, for example, Windows VMs. For tips to help manage your costs, see Prevent unexpected costs with Azure billing and cost management.

Managing limits

Note

Some services have adjustable limits.

When the limit can be adjusted, the tables include Default limit and Maximum limit headers. The limit can be raised above the default limit but not above the maximum limit. Some services with adjustable limits use different headers with information about adjusting the limit.

When a service doesn't have adjustable limits, the following tables use the header Limit without any additional information about adjusting the limit. In those cases, the default and the maximum limits are the same.

If you want to raise the limit or quota above the default limit, open an online customer support request at no charge.

The terms soft limit and hard limit often are used informally to describe the current, adjustable limit (soft limit) and the maximum limit (hard limit). If a limit isn't adjustable, there won't be a soft limit, only a hard limit.

Free Trial subscriptions aren't eligible for limit or quota increases. If you have a Free Trial subscription, you can upgrade to a Pay-As-You-Go subscription. For more information, see Upgrade your Azure Free Trial subscription to a Pay-As-You-Go subscription and the Free Trial subscription FAQ.

Some limits are managed at a regional level.

Let's use vCPU quotas as an example. To request a quota increase with support for vCPUs, you must decide how many vCPUs you want to use in which regions. You then request an increase in vCPU quotas for the amounts and regions that you want. If you need to use 30 vCPUs in West Europe to run your application there, you specifically request 30 vCPUs in West Europe. Your vCPU quota isn't increased in any other region--only West Europe has the 30-vCPU quota.

As a result, decide what your quotas must be for your workload in any one region. Then request that amount in each region into which you want to deploy. For help in how to determine your current quotas for specific regions, see Resolve errors for resource quotas.

General limits

For limits on resource names, see Naming rules and restrictions for Azure resources.

For information about Resource Manager API read and write limits, see Throttling Resource Manager requests.

Management group limits

The following limits apply to management groups.

Resource Limit
Management groups per Microsoft Entra tenant 10,000
Subscriptions per management group Unlimited.
Levels of management group hierarchy Root level plus 6 levels1
Direct parent management group per management group One
Management group level deployments per location 8002
Locations of Management group level deployments 10

1The 6 levels don't include the subscription level.

2If you reach the limit of 800 deployments, delete deployments from the history that are no longer needed. To delete management group level deployments, use Remove-AzManagementGroupDeployment or az deployment mg delete.

Subscription limits

The following limits apply when you use Azure Resource Manager and Azure resource groups.

Resource Limit
Azure subscriptions associated with a Microsoft Entra tenant Unlimited
Coadministrators per subscription Unlimited
Resource groups per subscription 980
Azure Resource Manager API request size 4,194,304 bytes
Tags per subscription1 50
Unique tag calculations per subscription2 80,000
Subscription-level deployments per location 8003
Locations of Subscription-level deployments 10

1You can apply up to 50 tags directly to a subscription. Within the subscription, each resource or resource group is also limited to 50 tags. However, the subscription can contain an unlimited number of tags that are dispersed across resources and resource groups.

2Resource Manager returns a list of tag name and values in the subscription only when the number of unique tags is 80,000 or less. A unique tag is defined by the combination of resource ID, tag name, and tag value. For example, two resources with the same tag name and value would be calculated as two unique tags. You still can find a resource by tag when the number exceeds 80,000.

3Deployments are automatically deleted from the history as you near the limit. For more information, see Automatic deletions from deployment history.

Resource group limits

Resource Limit
Resources per resource group Resources aren't limited by resource group. Instead, they're limited by resource type in a resource group. See next row.
Resources per resource group, per resource type 800 - Some resource types can exceed the 800 limit. See Resources not limited to 800 instances per resource group.
Deployments per resource group in the deployment history 8001
Resources per deployment 800
Management locks per unique scope 20
Number of tags per resource or resource group 50
Tag key length 512
Tag value length 256

1Deployments are automatically deleted from the history as you near the limit. Deleting an entry from the deployment history doesn't affect the deployed resources. For more information, see Automatic deletions from deployment history.

Template limits

Value Limit
Parameters 256
Variables 256
Resources (including copy count) 800
Outputs 64
Template expression 24,576 chars
Resources in exported templates 200
Template size 4 MB
Resource definition size 1 MB
Parameter file size 4 MB

You can exceed some template limits by using a nested template. For more information, see Use linked templates when you deploy Azure resources. To reduce the number of parameters, variables, or outputs, you can combine several values into an object. For more information, see Objects as parameters.

You may get an error with a template or parameter file of less than 4 MB, if the total size of the request is too large. For more information about how to simplify your template to avoid a large request, see Resolve errors for job size exceeded.

Microsoft Entra ID limits

Here are the usage constraints and other service limits for the Microsoft Entra service.

Category Limit
Tenants
  • A single user can belong to a maximum of 500 Microsoft Entra tenants as a member or a guest.
  • A single user can create a maximum of 200 directories.
  • Limit of 300 license-based subscriptions (such as Microsoft 365 subscriptions) per tenant
  • Domains
  • You can add no more than 5,000 managed domain names.
  • If you set up all of your domains for federation with on-premises Active Directory, you can add no more than 2,500 domain names in each tenant.
  • Resources
    • By default, a maximum of 50,000 Microsoft Entra resources can be created in a single tenant by users of the Microsoft Entra ID Free edition. If you have at least one verified domain, the default Microsoft Entra service quota for your organization is extended to 300,000 Microsoft Entra resources.
      The Microsoft Entra service quota for organizations created by self-service sign-up remains 50,000 Microsoft Entra resources, even after you perform an internal admin takeover and the organization is converted to a managed tenant with at least one verified domain. This service limit is unrelated to the pricing tier limit of 500,000 resources on the Microsoft Entra pricing page.
      To go beyond the default quota, you must contact Microsoft Support.
    • A non-admin user can create no more than 250 Microsoft Entra resources. Both active resources and deleted resources that are available to restore count toward this quota. Only deleted Microsoft Entra resources that were deleted fewer than 30 days ago are available to restore. Deleted Microsoft Entra resources that are no longer available to restore count toward this quota at a value of one-quarter for 30 days.
      If you have developers who are likely to repeatedly exceed this quota in the course of their regular duties, you can create and assign a custom role with permission to create a limitless number of app registrations.
    • Resource limitations apply to all directory objects in a given Microsoft Entra tenant, including users, groups, applications, and service principals.
    Schema extensions
    • String-type extensions can have a maximum of 256 characters.
    • Binary-type extensions are limited to 256 bytes.
    • Only 100 extension values, across all types and all applications, can be written to any single Microsoft Entra resource.
    • Only User, Group, TenantDetail, Device, Application, and ServicePrincipal entities can be extended with string-type or binary-type single-valued attributes.
    Applications
    • A maximum of 100 users and service principals can be owners of a single application.
    • A user, group, or service principal can have a maximum of 1,500 app role assignments. The limitation is on the service principal, user, or group across all app roles and not on the number of assignments on a single app role.
    • A user can have credentials configured for a maximum of 48 apps using password-based single sign-on. This limit only applies for credentials configured when the user is directly assigned the app, not when the user is a member of a group which is assigned.
    • A group can have credentials configured for a maximum of 48 apps using password-based single sign-on.
    • See additional limits in Validation differences by supported account types.
    Application manifest A maximum of 1,200 entries can be added to the application manifest.
    See additional limits in Validation differences by supported account types.
    Groups
    • A non-admin user can create a maximum of 250 groups in a Microsoft Entra organization. Any Microsoft Entra admin who can manage groups in the organization can also create an unlimited number of groups (up to the Microsoft Entra object limit). If you assign a role to a user to remove the limit for that user, assign a less privileged, built-in role such as User Administrator or Groups Administrator.
    • A Microsoft Entra organization can have a maximum of 5,000 dynamic groups and dynamic administrative units combined.
    • A maximum of 500 role-assignable groups can be created in a single Microsoft Entra organization (tenant).
    • A maximum of 100 users can be owners of a single group.
    • Any number of Microsoft Entra resources can be members of a single group.
    • A user can be a member of any number of groups. When security groups are being used in combination with SharePoint Online, a user can be a part of 2,049 security groups in total. This includes both direct and indirect group memberships. When this limit is exceeded, authentication and search results become unpredictable.
    • By default, the number of members in a group that you can synchronize from your on-premises Active Directory to Microsoft Entra ID by using Microsoft Entra Connect is limited to 50,000 members. If you need to sync a group membership that's over this limit, you must onboard the Microsoft Entra Connect Sync V2 endpoint API.
    • When you select a list of groups, you can assign a group expiration policy to a maximum of 500 Microsoft 365 groups. There is no limit when the policy is applied to all Microsoft 365 groups.

    At this time, the following scenarios are supported with nested groups:
    • One group can be added as a member of another group, and you can achieve group nesting.
    • Group membership claims. When an app is configured to receive group membership claims in the token, nested groups in which the signed-in user is a member are included.
    • Conditional access (when a conditional access policy has a group scope).
    • Restricting access to self-serve password reset.
    • Restricting which users can do Microsoft Entra join and device registration.

    The following scenarios are not supported with nested groups:
    • App role assignment, for both access and provisioning. Assigning groups to an app is supported, but any groups nested within the directly assigned group won't have access.
    • Group-based licensing (assigning a license automatically to all members of a group).
    • Microsoft 365 Groups.
    Application Proxy
    • A maximum of 500 transactions* per second per Application Proxy application.
    • A maximum of 750 transactions per second for the Microsoft Entra organization.

      *A transaction is defined as a single HTTP request and response for a unique resource. When clients are throttled, they'll receive a 429 response (too many requests). Transaction metrics are collected on each connector and can be monitored using performance counters under the object name Microsoft AAD App Proxy Connector.
    Access Panel There's no limit to the number of applications per user that can be displayed in the Access Panel, regardless of the number of assigned licenses.
    Reports A maximum of 1,000 rows can be viewed or downloaded in any report. Any additional data is truncated.
    Administrative units
    • A Microsoft Entra resource can be a member of no more than 30 administrative units.
    • A maximum of 100 restricted management administrative units in a tenant.
    • A Microsoft Entra organization can have a maximum of 5,000 dynamic groups and dynamic administrative units combined.
    Microsoft Entra roles and permissions
    • A maximum of 100 Microsoft Entra custom roles can be created in a Microsoft Entra organization.
    • A maximum of 150 Microsoft Entra custom role assignments for a single principal at any scope.
    • A maximum of 100 Microsoft Entra built-in role assignments for a single principal at non-tenant scope (such as an administrative unit or Microsoft Entra object). There is no limit to Microsoft Entra built-in role assignments at tenant scope. For more information, see Assign Microsoft Entra roles at different scopes.
    • A group can't be added as a group owner.
    • A user's ability to read other users' tenant information can be restricted only by the Microsoft Entra organization-wide switch to disable all non-admin users' access to all tenant information (not recommended). For more information, see To restrict the default permissions for member users.
    • It might take up to 15 minutes or you might have to sign out and sign back in before admin role membership additions and revocations take effect.
    Conditional Access Policies A maximum of 195 policies can be created in a single Microsoft Entra organization (tenant).
    Terms of use You can add no more than 40 terms to a single Microsoft Entra organization (tenant).
    Multi-tenant organizations
    • A maximum of 5 active tenants, including the owner tenant. The owner tenant can add more than 5 pending tenants, but they won't be able to join the multi-tenant organization if the limit is exceeded. This limit is applied at the time a pending tenant joins a multi-tenant organization.
    • A maximum of 100,000 internal users per active tenant. This limit is applied at the time a pending tenant joins a multi-tenant organization.

    API Center (preview) limits

    Resource Limit1
    Maximum number of APIs 1,000
    Maximum number of versions per API 100
    Maximum number of environments 1,000
    Maximum number of custom metadata properties 100
    Maximum number of child properties in custom metadata property of type "object" 100

    1 To increase an API Center limit, contact support.

    API Management limits

    Resource Limit
    Maximum number of scale units 31 per region1
    Cache size 5 GiB per unit2
    Concurrent back-end connections3 per HTTP authority 2,048 per unit4
    Maximum cached response size 2 MiB
    Maximum policy document size 256 KiB5
    Maximum custom gateway domains per service instance6 20
    Maximum number of CA certificates per service instance7 10
    Maximum number of service instances per subscription8 20
    Maximum number of subscriptions per service instance8 500
    Maximum number of client certificates per service instance8 50
    Maximum number of APIs per service instance8 50
    Maximum number of API management operations per service instance8 1,000
    Maximum total request duration8 30 seconds
    Maximum request payload size8 1 GiB
    Maximum buffered payload size8 2 MiB
    Maximum request/response payload size in diagnostic logs 8,192 bytes
    Maximum request URL size9 16,384 bytes
    Maximum length of URL path segment10 1,024 characters
    Maximum size of API schema used by validation policy10 4 MB
    Maximum number of schemas10 100
    Maximum size of request or response body in validate-content policy10 100 KB
    Maximum number of self-hosted gateways11 25
    Maximum number of active WebSocket connections per unit 5,00012
    Maximum number of tags supported by an API Management resource 15
    Maximum number of credential providers per service instance 1,000
    Maximum number of connections per credential provider 10,000
    Maximum number of access policies per connection 100
    Maximum number of authorization requests per minute per connection 250
    Maximum number of workspaces per service instance10 100

    1 Scaling limits depend on the pricing tier. For details on the pricing tiers and their scaling limits, see API Management pricing.
    2 Per unit cache size depends on the pricing tier. To see the pricing tiers and their scaling limits, see API Management pricing.
    3 Connections are pooled and reused unless explicitly closed by the back end.
    4 This limit is per unit of the Basic, Standard, and Premium tiers. The Developer tier is limited to 1,024. This limit doesn't apply to the Consumption tier.
    5 This limit applies to the Basic, Standard, and Premium tiers. In the Consumption tier, policy document size is limited to 16 KiB.
    6 Multiple custom domains are supported in the Developer and Premium tiers only.
    7 CA certificates are not supported in the Consumption tier.
    8 This limit applies to the Consumption tier only. In other tiers, API Management doesn't set a limit. However, your practical upper limit depends on service configuration including pricing tier, service capacity, number of scale units, policy configuration, API definitions and types, number of concurrent requests, and other factors.
    9 Applies to the Consumption tier only. Includes an up to 2048-bytes long query string.
    10 To increase this limit, contact support.
    11 Self-hosted gateways are supported in the Developer and Premium tiers only. The limit applies to the number of self-hosted gateway resources. To raise this limit contact support. Note, that the number of nodes (or replicas) associated with a self-hosted gateway resource is unlimited in the Premium tier and capped at a single node in the Developer tier.
    12 This limit does not apply to Developer tier. In the Developer tier, the limit is 2,500.

    App Service limits

    Resource Free Shared Basic Standard Premium (v1-v3) Isolated
    Web, mobile, or API apps per Azure App Service plan1 10 100 Unlimited2 Unlimited2 Unlimited2 Unlimited2
    App Service plan 10 per region

    1 free Linux App Service plan per region
    10 per resource group 100 per resource group 100 per resource group 100 per resource group 100 per resource group
    Compute instance type Shared Shared Dedicated3 Dedicated3 Dedicated3

    Dedicated3
    Scale out (maximum instances) 1 shared 1 shared 3 dedicated3 10 dedicated3 20 dedicated for v1; 30 dedicated for v2 and v3.3 100 dedicated4
    Storage5 1 GB5 1 GB5 10 GB5 50 GB5 250 GB5 1 TB12

    The available storage quota is 999 GB.
    CPU time (5 minutes)6 3 minutes 3 minutes Unlimited, pay at standard rates Unlimited, pay at standard rates Unlimited, pay at standard rates Unlimited, pay at standard rates
    CPU time (day)6 60 minutes 240 minutes Unlimited, pay at standard rates Unlimited, pay at standard rates Unlimited, pay at standard rates Unlimited, pay at standard rates
    Memory (1 hour) 1,024 MB per App Service plan 1,024 MB per app N/A N/A N/A N/A
    Bandwidth 165 MB Unlimited, data transfer rates apply Unlimited, data transfer rates apply Unlimited, data transfer rates apply Unlimited, data transfer rates apply Unlimited, data transfer rates apply
    Application architecture 32-bit 32-bit 32-bit/64-bit 32-bit/64-bit 32-bit/64-bit 32-bit/64-bit
    WebSockets per instance (Windows)7 5 35 350 Unlimited Unlimited Unlimited
    WebSockets per instance (Linux)7 5 N/A ~50K ~50K ~50K ~50K
    Outbound IP connections per instance 600 600 Depends on instance size8 Depends on instance size8 Depends on instance size8 16,000
    Concurrent debugger connections per application 1 1 1 5 5 5
    App Service Certificates per subscription Not supported Not supported 10 10 10 10
    Custom domains per app 0 (azurewebsites.net subdomain only) 500 500 500 500 500
    Custom domain SSL support Not supported, wildcard certificate for *.azurewebsites.net available by default Not supported, wildcard certificate for *.azurewebsites.net available by default Unlimited SNI SSL connections Unlimited SNI SSL and 1 IP SSL connections included Unlimited SNI SSL and 1 IP SSL connections included Unlimited SNI SSL and 1 IP SSL connections included
    Hybrid connections 5 per plan 25 per plan 220 per app 220 per app
    Virtual Network Integration X X X X
    Private Endpoints 100 per app 100 per app 100 per app
    Integrated load balancer X X X X X9
    Access restrictions 512 rules per app 512 rules per app 512 rules per app 512 rules per app 512 rules per app 512 rules per app
    Always On X X X X
    Scheduled backups Scheduled backups every 2 hours, a maximum of 12 backups per day (manual + scheduled Scheduled backups every 2 hours, a maximum of 12 backups per day (manual + scheduled) Scheduled backups every hour, a maximum of 50 backups per day (manual + scheduled) Scheduled backups every hour, a maximum of 50 backups per day (manual + scheduled)
    Autoscale X X X
    WebJobs10 X X X X X X
    Endpoint monitoring X X X X
    Staging slots per app 5 20 20
    Testing in Production X X X
    Diagnostic Logs X X X X X X
    Kudu X X X X X X
    Authentication and Authorization X X X X X X
    App Service Managed Certificates11 X X X X
    SLA 99.95% 99.95% 99.95% 99.95%

    1 Apps and storage quotas are per App Service plan unless noted otherwise.

    2 The actual number of apps that you can host on these machines depends on the activity of the apps, the size of the machine instances, and the corresponding resource utilization.

    3 Dedicated instances can be of different sizes. For more information, see App Service pricing.

    4 More are allowed upon request.

    5 The storage limit is the total content size across all apps in the same App service plan. The total content size of all apps across all App service plans in a single resource group and region cannot exceed 500 GB. The file system quota for App Service hosted apps is determined by the aggregate of App Service plans created in a region and resource group.

    6 These resources are constrained by physical resources on the dedicated instances (the instance size and the number of instances).

    7If you scale a Windows app in the Basic tier to two instances, you have 350 concurrent connections for each of the two instances. For Windows apps on Standard tier and above, there are no theoretical limits to WebSockets, but other factors can limit the number of WebSockets. For example, maximum concurrent requests allowed (defined by maxConcurrentRequestsPerCpu) are: 7,500 per small VM, 15,000 per medium VM (7,500 x 2 cores), and 75,000 per large VM (18,750 x 4 cores). Linux apps are limited 5 concurrent WebSocket connections on Free SKU and ~50k concurrent WebSocket connections per instance on all other SKUs.

    8 The maximum IP connections are per instance and depend on the instance size: 1,920 per B1/S1/P1V3 instance, 3,968 per B2/S2/P2V3 instance, 8,064 per B3/S3/P3V3 instance.

    9 App Service Isolated SKUs can be internally load balanced (ILB) with Azure Load Balancer, so there's no public connectivity from the internet. As a result, some features of an ILB Isolated App Service must be used from machines that have direct access to the ILB network endpoint.

    10 Run custom executables and/or scripts on demand, on a schedule, or continuously as a background task within your App Service instance. Always On is required for continuous WebJobs execution. There's no predefined limit on the number of WebJobs that can run in an App Service instance. There are practical limits that depend on what the application code is trying to do.

    11 Only issuing standard certificates (wildcard certificates aren't available). Limited to only one free certificate per custom domain.

    12 Total storage usage across all apps deployed in a single App Service Environment (regardless of how they're allocated across different resource groups).

    Automation limits

    Process automation

    Resource Limit Notes
    Maximum number of new jobs that can be submitted every 30 seconds per Azure Automation account 100 When this limit is reached, the subsequent requests to create a job fail. The client receives an error response.
    Maximum number of concurrent running jobs at the same instance of time per Automation account 200 When this limit is reached, the subsequent requests to create a job fail. The client receives an error response.

    Free trial and Azure for Student subscriptions can run up to 10 concurrent jobs at the same instance of time per Automation account. 2
    Maximum storage size of job metadata for a 30-day rolling period 10 GB (approximately 4 million jobs) When this limit is reached, the subsequent requests to create a job fail.
    Maximum job stream limit 1 MiB A single stream cannot be larger than 1 MiB.
    Maximum job stream limit on Azure Automation portal 200KB Portal limit to show the job logs.
    Maximum number of modules that can be imported every 30 seconds per Automation account 5
    Maximum size of a module 100 MB
    Maximum size of a node configuration file 1 MB Applies to state configuration
    Job run time, Free tier 500 minutes per subscription per calendar month
    Maximum amount of disk space allowed per sandbox1 1 GB Applies to Azure sandboxes only.
    Maximum amount of memory given to a sandbox1 400 MB Applies to Azure sandboxes only.
    Maximum number of network sockets allowed per sandbox1 1,000 Applies to Azure sandboxes only.
    Maximum runtime allowed per runbook1 3 hours Applies to Azure sandboxes only.
    Maximum number of Automation accounts in a subscription No limit Enterprise and Pay-as-you-go subscriptions can create Automation accounts in any of the regions supported by the service.

    Free trial and Azure for Student subscriptions can create only one Automation account per region per subscription. Allowed list of regions: EastUS, EastUS2, WestUS, NorthEurope, SoutheastAsia, and JapanWest 2
    Maximum number of system hybrid runbook workers per Automation Account 4,000
    Maximum number of user hybrid runbook workers per Automation Account 4,000
    Maximum number of concurrent jobs that can be run on a single Hybrid Runbook Worker 50
    Maximum runbook job parameter size 512 kilobytes
    Maximum runbook parameters 50 If you reach the 50-parameter limit, you can pass a JSON or XML string to a parameter and parse it with the runbook.
    Maximum webhook payload size 512 kilobytes
    Maximum days that job data is retained 30 days
    Maximum PowerShell workflow state size 5 MB Applies to PowerShell workflow runbooks when checkpointing workflow.
    Maximum number of tags supported by an Automation account 15
    Maximum number of characters in the value field of a variable 1048576

    1A sandbox is a shared environment that can be used by multiple jobs. Jobs that use the same sandbox are bound by the resource limitations of the sandbox.
    2To request a limit increase, create an Azure Support request. Free subscriptions including Azure Free Account and Azure for Students aren't eligible for limit or quota increases. If you have a free subscription, you can upgrade to Pay-As-You-Go subscription.

    Change Tracking and Inventory

    The following table shows the tracked item limits per machine for change tracking.

    Resource Limit Notes
    File 500
    File size 5 MB
    Registry 250
    Windows software 250 Doesn't include software updates.
    Linux packages 1,250
    Services 250
    Daemon 250

    Update Management

    The following table shows the limits for Update Management.

    Resource Limit Notes
    Number of machines per update deployment 1000
    Number of dynamic groups per update deployment 500

    Azure App Configuration

    Resource Limit Comment
    Configuration stores for Free tier One store per region per subscription.
    Configuration stores for Standard tier Unlimited stores per subscription.
    Configuration store requests for Free tier 1,000 requests per day Once the quota is exhausted, HTTP status code 429 is returned for all requests until the end of the day.
    Configuration store requests for Standard tier 30,000 per hour Once the quota is exhausted, requests may return HTTP status code 429 indicating Too Many Requests - until the end of the hour.
    Storage for Free tier 10 MB There is no limit on the number of keys and labels as long as their total size is below the storage limit.
    Storage for Standard tier 1 GB There is no limit on the number of keys and labels as long as their total size is below the storage limit.
    Keys and values 10 KB For a single key-value item, including all metadata.
    Snapshots storage for Free tier 10 MB Snapshots storage is extra and in addition to "Storage for Free Tier". Storage for both archived and active snapshots is counted towards this limit.
    Snapshots storage for Standard tier 1 GB Snapshots storage is extra and in addition to "Storage for Standard Tier". Storage for both archived and active snapshots is counted towards this limit.
    Snapshot size 1 MB

    Azure Cache for Redis limits

    Resource Limit
    Cache size 1.2 TB
    Databases 64
    Maximum connected clients 40,000
    Azure Cache for Redis replicas, for high availability 3
    Shards in a premium cache with clustering 10

    Azure Cache for Redis limits and sizes are different for each pricing tier. To see the pricing tiers and their associated sizes, see Azure Cache for Redis pricing.

    For more information on Azure Cache for Redis configuration limits, see Default Redis server configuration.

    Because configuration and management of Azure Cache for Redis instances is done by Microsoft, not all Redis commands are supported in Azure Cache for Redis. For more information, see Redis commands not supported in Azure Cache for Redis.

    Azure Cloud Services limits

    Resource Limit
    Web or worker roles per deployment1 25
    Instance input endpoints per deployment 25
    Input endpoints per deployment 25
    Internal endpoints per deployment 25
    Hosted service certificates per deployment 199

    1Each Azure Cloud Service with web or worker roles can have two deployments, one for production and one for staging. This limit refers to the number of distinct roles, that is, configuration. This limit doesn't refer to the number of instances per role, that is, scaling.

    Azure AI Search limits

    Pricing tiers determine the capacity and limits of your search service. Tiers include:

    • Free multitenant service, shared with other Azure subscribers, is intended for evaluation and small development projects.
    • Basic provides dedicated computing resources for production workloads at a smaller scale, with up to three replicas for highly available query workloads.
    • Standard, which includes S1, S2, S3, and S3 High Density, is for larger production workloads. Multiple levels exist within the Standard tier so that you can choose a resource configuration that best matches your workload profile.

    Limits per subscription

    You can create multiple billable search services (Basic and higher), up to the maximum number of services allowed at each tier. For example, you could create up to 16 services at the Basic tier and another 16 services at the S1 tier within the same subscription. For more information about tiers, see Choose a tier (or SKU) for Azure AI Search.

    Maximum service limits can be raised upon request. If you need more services within the same subscription, file a support request.

    Resource Free 1 Basic S1 S2 S3 S3 HD L1 L2
    Maximum services 1 16 16 8 6 6 6 6
    Maximum search units (SU)2 N/A 3 SU 36 SU 36 SU 36 SU 36 SU 36 SU 36 SU

    1 You can have one free search service per Azure subscription. The free tier is based on infrastructure shared with other customers. Because the hardware isn't dedicated, scale-up isn't supported, and storage is limited to 50 MB.

    2 Search units (SU) are billing units, allocated as either a replica or a partition. You need both. To learn more about SU combinations, see Estimate and manage capacity of a search service.

    Limits per search service

    A search service is subject to a maximum storage limit (partition size multiplied by the number of partitions) or by a hard limit on the maximum number of indexes or indexers, whichever comes first.

    Resource Free 1 Basic 1 S1 S2 S3 S3 HD L1 L2
    Service level agreement (SLA) 2 No Yes Yes Yes Yes Yes Yes Yes
    Storage (partition size) 50 MB 3 2 GB 25 GB 100 GB 200 GB 200 GB 1 TB 2 TB
    Partitions N/A 1 12 12 12 3 12 12
    Replicas N/A 3 12 12 12 12 12 12

    1 Basic has one fixed partition. You can specify up to 3 more search units to add replicas for larger query volumes and high availability.

    2 Service level agreements apply to billable services having dedicated resources. Free services and preview features have no SLA. For billable services, SLAs take effect when you provision sufficient redundancy for your service. Two or more replicas are required for query (read) SLAs. Three or more replicas are required for query and indexing (read-write) SLAs. The number of partitions isn't an SLA consideration. See Reliability in Azure AI Search to learn more about replicas and high availability.

    3 Free services don't have a dedicated partition. The 50-MB storage limit refers to the maximum space allocated to a free search service on infrastructure shared with other customers.

    To learn more about limits on a more granular level, such as document size, queries per second, keys, requests, and responses, see Service limits in Azure AI Search.

    Azure AI services limits

    The following limits are for the number of Azure AI services resources per Azure subscription. There is a limit of only one allowed 'Free' account, per resource type, per subscription. Each of the Azure AI services may have other limitations, for more information, see Azure AI services.

    Type Limit Example
    A mixture of Azure AI services resources Maximum of 200 total Azure AI services resources per region. 100 Azure AI Vision resources in West US, 50 Azure AI Speech resources in West US, and 50 Azure AI Language resources in West US.
    A single type of Azure AI services resources. Maximum of 100 resources per region 100 Azure AI Vision resources in West US 2, and 100 Azure AI Vision resources in East US.

    Azure Chaos Studio limits

    For Azure Chaos Studio limits, see Azure Chaos Studio service limits.

    Azure Communications Gateway limits

    Some of the following default limits and quotas can be increased. To request a change, create a change request stating the limit you want to change.

    The following restrictions apply to all Azure Communications Gateways:

    • All traffic must use IPv4.
    • All traffic must use TLS 1.2 or greater. Earlier versions aren't supported.
    • The number of active calls is limited to 15% of the number of users assigned to Azure Communications Gateway. For the definition of users, see Plan and manage costs for Azure Communications Gateway.
    • The number of calls being actively transcoded is limited to 5% of the total number of active calls.

    Azure Communications Gateway also has limits on the SIP signaling.

    Resource Limit
    Maximum SIP message size 10 Kilobytes
    Maximum length of an SDP message body 128 Kilobytes
    Maximum length of request URI 256 Bytes
    Maximum length of Contact header URI 256 Bytes
    Maximum length of the userinfo part of a URI 256 Bytes
    Maximum length of domain name in From header 255 Bytes
    Maximum length of a SIP header's name 32 Bytes
    Maximum length of a SIP body name 64 Bytes
    Maximum length of a Supported, Require or Proxy-Require header 256 Bytes
    Maximum length of a SIP option-tag 32 Bytes

    Some endpoints might add parameters in the following headers to an in-dialog message when those parameters weren't present in the dialog-creating message. In that case, Azure Communications Gateway strips the parameters, because RFC 3261 doesn't permit this behavior.

    • Request URI
    • To header
    • From header

    The Provisioning API has a rate limit of 100 requests per minute, applied across all the resources. A batch request to update multiple resources counts as one request.

    Azure Container Apps limits

    For Azure Container Apps limits, see Quotas in Azure Container Apps.

    The amount of disk space available to your application varies based on the associated workload profile. Available disk space determines the image size limit you can deploy to your container apps.

    For dedicated workload profiles, the image size limit is per instance.

    Display name Name Image Size Limit (GB)
    Consumption consumption 8*
    Dedicated-D4 D4 90
    Dedicated-D8 D8 210
    Dedicated-D16 D16 460
    Dedicated-D32 D32 940
    Dedicated-E4 E4 90
    Dedicated-E8 E8 210
    Dedicated-E16 E16 460
    Dedicated-E32 E32 940
    Dedicated-NC24-A100 (preview) NC24-A100 210
    Dedicated-NC48-A100 (preview) NC48-A100 460
    Dedicated-NC96-A100 (preview) NC96-A100 940

    * The image size limit for a consumption workload profile is a shared among both image and app. For example, logs used by your app are subject to this size limit.

    Azure Cosmos DB limits

    For Azure Cosmos DB limits, see Limits in Azure Cosmos DB.

    Azure Data Explorer limits

    The following table describes the maximum limits for Azure Data Explorer clusters.

    Resource Limit
    Clusters per region per subscription 20
    Instances per cluster 1,000
    Number of databases in a cluster 10,000
    Number of follower clusters (data share consumers) per leader cluster (data share producer) 100

    Note

    You can request higher limits for Number of databases in a cluster and Clusters per region per subscription. To request an increase, contact Azure Support.

    The following table describes the limits on management operations performed on Azure Data Explorer clusters.

    Scope Operation Limit
    Cluster read (for example, get a cluster) 500 per 5 minutes
    Cluster write (for example, create a database) 1,000 per hour

    Azure Database for MySQL

    For Azure Database for MySQL limits, see Limitations in Azure Database for MySQL.

    Azure Database for PostgreSQL

    For Azure Database for PostgreSQL limits, see Limitations in Azure Database for PostgreSQL.

    Azure Deployment Environments limits

    Subscription Runtime limit per deployment​ Runtime limit per month per region per subscription​ Storage limit per Environment​
    Enterprise 30 min 5000 min 1 GB
    Pay as you go 10 min 200 min 1 GB
    Azure Pass 10 min 200 min 1 GB
    MSDN 10 min 200 min 1 GB
    CSP 10 min 200 min 1 GB
    Free trial 10 min 200 min 1 GB
    Azure for students 10 min 200 min 1 GB

    Azure Files and Azure File Sync

    To learn more about the limits for Azure Files and File Sync, see Azure Files scalability and performance targets.

    Azure Functions limits

    Resource Consumption plan Premium plan Dedicated plan ASE Kubernetes
    Default timeout duration (min) 5 30 301 30 30
    Max timeout duration (min) 10 unbounded7 unbounded2 unbounded unbounded
    Max outbound connections (per instance) 600 active (1200 total) unbounded unbounded unbounded unbounded
    Max request size (MB)3 100 100 100 100 Depends on cluster
    Max query string length3 4096 4096 4096 4096 Depends on cluster
    Max request URL length3 8192 8192 8192 8192 Depends on cluster
    ACU per instance 100 210-840 100-840 210-2508 AKS pricing
    Max memory (GB per instance) 1.5 3.5-14 1.75-14 3.5 - 14 Any node is supported
    Max instance count (Windows/Linux) 200/100 100/20 varies by SKU9 1009 Depends on cluster
    Function apps per plan11 100 100 unbounded4 unbounded unbounded
    App Service plans 100 per region 100 per resource group 100 per resource group - -
    Deployment slots per app10 2 3 1-209 20 n/a
    Storage5 5 GB 250 GB 50-1000 GB 1 TB n/a
    Custom domains per app 5006 500 500 500 n/a
    Custom domain SSL support unbounded SNI SSL connection included unbounded SNI SSL and 1 IP SSL connections included unbounded SNI SSL and 1 IP SSL connections included unbounded SNI SSL and 1 IP SSL connections included n/a

    1 By default, the timeout for the Functions 1.x runtime in an App Service plan is unbounded.
    2 Requires the App Service plan be set to Always On. Pay at standard rates.
    3 These limits are set in the host.
    4 The actual number of function apps that you can host depends on the activity of the apps, the size of the machine instances, and the corresponding resource utilization.
    5 The storage limit is the total content size in temporary storage across all apps in the same App Service plan. Consumption plan uses Azure Files for temporary storage.
    6 When your function app is hosted in a Consumption plan, only the CNAME option is supported. For function apps in a Premium plan or an App Service plan, you can map a custom domain using either a CNAME or an A record.
    7 Guaranteed for up to 60 minutes.
    8 Workers are roles that host customer apps. Workers are available in three fixed sizes: One vCPU/3.5 GB RAM; Two vCPU/7 GB RAM; Four vCPU/14 GB RAM.
    9 See App Service limits for details.
    10 Including the production slot.
    11 There's currently a limit of 5000 function apps in a given subscription.

    For more information, see Functions Hosting plans comparison.

    Azure Health Data Services

    Azure Health Data Services limits

    Health Data Services is a set of managed API services based on open standards and frameworks. Health Data Services enables workflows to improve healthcare and offers scalable and secure healthcare solutions. Health Data Services includes Fast Healthcare Interoperability Resources (FHIR) service, the Digital Imaging and Communications in Medicine (DICOM) service, and MedTech service.

    FHIR service is an implementation of the FHIR specification within Health Data Services. It enables you to combine in a single workspace one or more FHIR service instances with optional DICOM and MedTech service instances. Azure API for FHIR is generally available as a stand-alone service offering.

    FHIR service in Azure Health Data Services has a limit of 4 TB for structured storage.

    Quota Name Default Limit Maximum Limit Notes
    Workspace 10 Contact support Limit per subscription
    FHIR 10 Contact support Limit per workspace
    DICOM 10 Contact support Limit per workspace
    MedTech 10 N/A Limit per workspace, can't be increased

    Azure API for FHIR service limits

    Azure API for FHIR is a managed, standards-based, compliant API for clinical health data that enables solutions for actionable analytics and machine learning.

    Quota Name Default Limit Maximum Limit Notes
    Request Units (RUs) 100,000 RUs Contact support Maximum available is 1,000,000. You need a minimum of 400 RUs or 40 RUs/GB, whichever is larger.
    Concurrent connections 15 concurrent connections on two instances (for a total of 30 concurrent requests) Contact support
    Azure API for FHIR Service Instances per Subscription 10 Contact support

    Azure Kubernetes Service limits

    Resource Limit
    Maximum clusters per subscription 5000
    Note: spread clusters across different regions to account for Azure API throttling limits
    Maximum nodes per cluster with Virtual Machine Scale Sets and Standard Load Balancer SKU 5000 across all node pools (default limit: 1000)
    Note: Running more than a 1000 nodes per cluster requires increasing the default node limit quota. Contact support for assistance.
    Maximum nodes per node pool (Virtual Machine Scale Sets node pools) 1000
    Maximum node pools per cluster 100
    Maximum pods per node: with Kubenet networking plug-in1 Maximum: 250
    Azure CLI default: 110
    Azure Resource Manager template default: 110
    Azure portal deployment default: 30
    Maximum pods per node: with Azure Container Networking Interface (Azure CNI)1 Maximum: 250
    Maximum recommended for Windows Server containers: 110
    Default: 30
    Open Service Mesh (OSM) AKS addon Kubernetes Cluster Version: AKS Supported Versions
    OSM controllers per cluster: 1
    Pods per OSM controller: 1600
    Kubernetes service accounts managed by OSM: 160
    Maximum load-balanced kubernetes services per cluster with Standard Load Balancer SKU 300
    Maximum nodes per cluster with Virtual Machine Availability Sets and Basic Load Balancer SKU 100

    1 Windows Server containers must use Azure CNI networking plug-in. Kubenet is not supported for Windows Server containers.

    Kubernetes Control Plane tier Limit
    Standard tier Automatically scales Kubernetes API server based on load. Larger control plane component limits and API server/etc instances.
    Free tier Limited resources with inflight requests limit of 50 mutating and 100 read-only calls. Recommended node limit of 10 nodes per cluster. Best for experimenting, learning, and simple testing. Not advised for production/critical workloads.

    Azure Lab Services

    The following limits are for the number of Azure Lab Services resources.

    Per resource type

    Grouping Resource type Limit
    Per subscription Labs 980
    Per resource group Labs 800
    Lab plans 800
    Per lab Schedules 250
    Virtual machines (VMs) 400

    Per region - Lab plans and labs

    Subscription type Lab plan limits Lab limits
    Default 2 2
    Pay As You Go 500 500
    MPN 500 500
    Azure In Open 500 500
    Enterprise Agreement 500 500
    MSDN 500 500
    Sponsored 100 15
    CSP 500 500
    Azure Pass 100 25
    Free Trial 100 15
    Azure for Students 100 15

    For more information about Azure Lab Services capacity limits, see Capacity limits in Azure Lab Services.

    Contact support to request an increase your limit.

    Azure Load Testing limits

    For Azure Load Testing limits, see Service limits in Azure Load Testing.

    Azure Machine Learning limits

    The latest values for Azure Machine Learning Compute quotas can be found in the Azure Machine Learning quota page

    Azure Maps limits

    Note

    Azure Maps Gen1 Price Tier Retirement

    Gen1 pricing tier is now deprecated and will be retired on 9/15/26. Gen2 pricing tier replaces Gen1 (both S0 and S1) pricing tier. If your Azure Maps account has Gen1 pricing tier selected, you can switch to Gen2 pricing before it's retired, otherwise it will automatically be updated. For more information, see Manage the pricing tier of your Azure Maps account.

    For Azure Maps queries per second limits, see Azure Maps QPS rate limits

    The following table shows the cumulative data size limit for Azure Maps accounts in an Azure subscription. The Azure Maps Data service is available only at the Gen1 (S1) and Gen2 pricing tier.

    Resource Limit
    Maximum storage per Azure subscription 1 GB
    Maximum size per file upload 100 MB

    Note

    Azure Maps Data service Retirement

    The Azure Maps Data service (both v1 and v2) is now deprecated and will be retired on 9/16/24. The Azure Maps Data Registry service is replacing the Data service. For more information, see How to create data registry

    Azure Monitor limits

    For Azure Monitor limits, see Azure Monitor service limits.

    Azure Data Factory limits

    Azure Data Factory is a multitenant service that has the following default limits in place to make sure customer subscriptions are protected from each other's workloads. To raise the limits up to the maximum for your subscription, contact support.

    Resource Default limit Maximum limit
    Total number of entities, such as pipelines, data sets, triggers, linked services, Private Endpoints, and integration runtimes, within a data factory 5,000 Find out how to request a quota increase from support.
    Total CPU cores for Azure-SSIS Integration Runtimes under one subscription 64 Find out how to request a quota increase from support.
    Concurrent pipeline runs per data factory that's shared among all pipelines in the factory 10,000 10,000
    Concurrent External activity runs per subscription per Azure Integration Runtime region
    External activities are managed on integration runtime but execute on linked services, including Databricks, stored procedure, Web, and others. This limit does not apply to Self-hosted IR.
    3,000 3,000
    Concurrent Pipeline activity runs per subscription per Azure Integration Runtime region
    Pipeline activities execute on integration runtime, including Lookup, GetMetadata, and Delete. This limit does not apply to Self-hosted IR.
    1,000 1,000
    Concurrent authoring operations per subscription per Azure Integration Runtime region
    Including test connection, browse folder list and table list, preview data. This limit does not apply to Self-hosted IR.
    200 200
    Concurrent Data Integration Units1 consumption per subscription per Azure Integration Runtime region Region group 12: 6,000
    Region group 22: 3,000
    Region group 32: 1,500
    Region group 12: 6,000
    Region group 22: 3,000
    Region group 32: 1,500
    Concurrent Data Integration Units1 consumption per subscription per Azure Integration Runtime region in managed virtual network 2,400 Find out how to request a quota increase from support.
    Maximum activities per pipeline, which includes inner activities for containers 40 40
    Maximum number of linked integration runtimes that can be created against a single self-hosted integration runtime 100 100
    Maximum number of nodes that can be created against a single self-hosted integration runtime 4 Find out how to request a quota increase from support.
    Maximum parameters per pipeline 50 50
    ForEach items 100,000 100,000
    ForEach parallelism 20 50
    Maximum queued runs per pipeline 100 100
    Characters per expression 8,192 8,192
    Minimum tumbling window trigger interval 5 min 15 min
    Minimum timeout for pipeline activity runs 10 min 10 min
    Maximum timeout for pipeline activity runs 7 days 7 days
    Bytes per object for pipeline objects3 200 KB 200 KB
    Bytes per object for dataset and linked service objects3 100 KB 2,000 KB
    Bytes per payload for each activity run4 896 KB 896 KB
    Data Integration Units1 per copy activity run 256 256
    Write API calls 1,200/h 1,200/h

    This limit is imposed by Azure Resource Manager, not Azure Data Factory.
    Read API calls 12,500/h 12,500/h

    This limit is imposed by Azure Resource Manager, not Azure Data Factory.
    Monitoring queries per minute 1,000 1,000
    Maximum time of data flow debug session 8 hrs 8 hrs
    Concurrent number of data flows per integration runtime 50 Find out how to request a quota increase from support.
    Concurrent number of data flows per integration runtime in managed vNet 50 Find out how to request a quota increase from support.
    Concurrent number of data flow debug sessions per user per factory 3 3
    Data Flow Azure IR TTL limit 4 hrs 4 hrs
    Meta Data Entity Size limit in a factory 2 GB Find out how to request a quota increase from support.

    1 The data integration unit (DIU) is used in a cloud-to-cloud copy operation, learn more from Data integration units (version 2). For information on billing, see Azure Data Factory pricing.

    2 Azure Integration Runtime is globally available to ensure data compliance, efficiency, and reduced network egress costs.

    Region group Regions
    Region group 1 Central US, East US, East US 2, North Europe, West Europe, West US, West US 2
    Region group 2 Australia East, Australia Southeast, Brazil South, Central India, Japan East, North Central US, South Central US, Southeast Asia, West Central US
    Region group 3 Other regions

    If managed virtual network is enabled, the data integration unit (DIU) in all region groups are 2,400.

    3 Pipeline, data set, and linked service objects represent a logical grouping of your workload. Limits for these objects don't relate to the amount of data you can move and process with Azure Data Factory. Data Factory is designed to scale to handle petabytes of data.

    4 The payload for each activity run includes the activity configuration, the associated dataset(s) and linked service(s) configurations if any, and a small portion of system properties generated per activity type. Limit for this payload size doesn't relate to the amount of data you can move and process with Azure Data Factory. Learn about the symptoms and recommendation if you hit this limit.

    Web service call limits

    Azure Resource Manager has limits for API calls. You can make API calls at a rate within the Azure Resource Manager API limits.

    Azure NetApp Files

    Azure NetApp Files has a regional limit for capacity. The standard capacity limit for each subscription is 25 TiB, per region, across all service levels. To increase the capacity, use the Service and subscription limits (quotas) support request.

    To learn more about the limits for Azure NetApp Files, see Resource limits for Azure NetApp Files.

    Azure Policy limits

    There's a maximum count for each object type for Azure Policy. For definitions, an entry of Scope means the management group or subscription. For assignments and exemptions, an entry of Scope means the management group, subscription, resource group, or individual resource.

    Where What Maximum count
    Scope Policy definitions 500
    Scope Initiative definitions 200
    Tenant Initiative definitions 2,500
    Scope Policy or initiative assignments 200
    Scope Exemptions 1000
    Policy definition Parameters 20
    Initiative definition Policies 1000
    Initiative definition Parameters 400
    Policy or initiative assignments Exclusions (notScopes) 400
    Policy rule Nested conditionals 512
    Remediation task Resources 50,000
    Policy definition, initiative, or assignment request body Bytes 1,048,576

    Policy rules have additional limits to the number of conditions and their complexity. See Policy rule limits for more details.

    Azure Quantum limits

    Provider Limits & Quota

    The Azure Quantum Service supports both first and third-party service providers. Third-party providers own their limits and quotas. Users can view offers and limits in the Azure portal when configuring third-party providers.

    You can find the published quota limits for Microsoft's first party Optimization Solutions provider below.

    Learn & Develop SKU

    Resource Limit
    CPU-based concurrent jobs up to 51 concurrent jobs
    FPGA-based concurrent jobs up to 21 concurrent jobs
    CPU-based solver hours 20 hours per month
    FPGA-based solver hours 1 hour per month

    While on the Learn & Develop SKU, you cannot request an increase on your quota limits. Instead you should switch to the Performance at Scale SKU.

    Performance at Scale SKU

    Resource Default Limit Maximum Limit
    CPU-based concurrent jobs up to 1001 concurrent jobs same as default limit
    FPGA-based concurrent jobs up to 101 concurrent jobs same as default limit
    Solver hours 1,000 hours per month up to 50,000 hours per month

    Reach out to Azure Support to request a limit increase.

    For more information, please review the Azure Quantum pricing page. Review the relevant provider pricing pages in the Azure portal for details on third-party offerings.

    1 Describes the number of jobs that can be queued at the same time.

    Azure RBAC limits

    The following limits apply to Azure role-based access control (Azure RBAC).

    Area Resource Limit
    Azure role assignments
    Azure role assignments per Azure subscription 4,000
    Azure role assignments per management group 500
    Size of description for Azure role assignments 2 KB
    Size of condition for Azure role assignments 8 KB
    Azure custom roles
    Azure custom roles per tenant 5,000
    Azure custom roles per tenant
    (for Microsoft Azure operated by 21Vianet)
    2,000
    Size of role name for Azure custom roles 512 chars
    Size of description for Azure custom roles 2 KB
    Number of assignable scopes for Azure custom roles 2,000

    Azure SignalR Service limits

    Resource Default limit Maximum limit
    Azure SignalR Service units per instance for Free tier 1 1
    Azure SignalR Service units per instance for Standard/Premium_P1 tier 100 100
    Azure SignalR Service units per instance for Premium_P2 tier 100 - 1,000 100 - 1,000
    Azure SignalR Service units per subscription per region for Free tier 5 5
    Total Azure SignalR Service unit counts per subscription per region 150 Unlimited
    Concurrent connections per unit for Free tier 20 20
    Concurrent connections per unit for Standard/Premium tier 1,000 1,000
    Included messages per unit per day for Free tier 20,000 20,000
    Additional messages per unit per day for Free tier 0 0
    Included messages per unit per day for Standard/Premium tier 1,000,000 1,000,000
    Additional messages per unit per day for Standard/Premium tier Unlimited Unlimited

    To request an update to your subscription's default limits, open a support ticket.

    For more information about how connections and messages are counted, see Messages and connections in Azure SignalR Service.

    If your requirements exceed the limits, switch from Free tier to Standard tier and add units. For more information, see How to scale an Azure SignalR Service instance?.

    If your requirements exceed the limits of a single instance, add instances. For more information, see How to enable Geo-Replication in Azure SignalR Service.

    Azure Spring Apps limits

    To learn more about the limits for Azure Spring Apps, see Quotas and service plans for Azure Spring Apps.

    Azure Storage limits

    This section lists the following limits for Azure Storage:

    Standard storage account limits

    The following table describes default limits for Azure general-purpose v2 (GPv2), general-purpose v1 (GPv1), and Blob storage accounts. The ingress limit refers to all data that is sent to a storage account. The egress limit refers to all data that is received from a storage account.

    Microsoft recommends that you use a GPv2 storage account for most scenarios. You can easily upgrade a GPv1 or a Blob storage account to a GPv2 account with no downtime and without the need to copy data. For more information, see Upgrade to a GPv2 storage account.

    Note

    You can request higher capacity and ingress limits. To request an increase, contact Azure Support.

    Resource Limit
    Maximum number of storage accounts with standard endpoints per region per subscription, including standard and premium storage accounts. 250 by default, 500 by request1
    Maximum number of storage accounts with Azure DNS zone endpoints (preview) per region per subscription, including standard and premium storage accounts. 5000 (preview)
    Default maximum storage account capacity 5 PiB 2
    Maximum number of blob containers, blobs, directories and subdirectories (if Hierarchical Namespace is enabled), file shares, tables, queues, entities, or messages per storage account. No limit
    Default maximum request rate per storage account 20,000 requests per second2
    Default maximum ingress per general-purpose v2 and Blob storage account in the following regions:
    • East Asia
    • Southeast Asia
    • Australia East
    • Brazil South
    • Canada Central
    • China East 2
    • China North 3
    • North Europe
    • West Europe
    • France Central
    • Germany West Central
    • Central India
    • Japan East
    • Jio India West
    • Korea Central
    • Norway East
    • South Africa North
    • Sweden Central
    • UAE North
    • UK South
    • Central US
    • East US
    • East US 2
    • USGov Virginia
    • USGov Arizona
    • North Central US
    • South Central US
    • West US
    • West US 2
    • West US 3
    60 Gbps2
    Default maximum ingress per general-purpose v2 and Blob storage account in regions that aren't listed in the previous row. 25 Gbps2
    Default maximum ingress for general-purpose v1 storage accounts (all regions) 10 Gbps2
    Default maximum egress for general-purpose v2 and Blob storage accounts in the following regions:
    • East Asia
    • Southeast Asia
    • Australia East
    • Brazil South
    • Canada Central
    • China East 2
    • China North 3
    • North Europe
    • West Europe
    • France Central
    • Germany West Central
    • Central India
    • Japan East
    • Jio India West
    • Korea Central
    • Norway East
    • South Africa North
    • Sweden Central
    • UAE North
    • UK South
    • Central US
    • East US
    • East US 2
    • USGov Virginia
    • USGov Arizona
    • North Central US
    • South Central US
    • West US
    • West US 2
    • West US 3
    120 Gbps2
    Default maximum egress for general-purpose v2 and Blob storage accounts in regions that aren't listed in the previous row. 50 Gbps2
    Maximum egress for general-purpose v1 storage accounts (US regions) 20 Gbps if RA-GRS/GRS is enabled, 30 Gbps for LRS/ZRS
    Maximum egress for general-purpose v1 storage accounts (non-US regions) 10 Gbps if RA-GRS/GRS is enabled, 15 Gbps for LRS/ZRS
    Maximum number of IP address rules per storage account 200
    Maximum number of virtual network rules per storage account 200
    Maximum number of resource instance rules per storage account 200
    Maximum number of private endpoints per storage account 200

    1 With a quota increase, you can create up to 500 storage accounts with standard endpoints per region. For more information, see Increase Azure Storage account quotas. 2 Azure Storage standard accounts support higher capacity limits and higher limits for ingress and egress by request. To request an increase in account limits, contact Azure Support.

    Azure Storage resource provider limits

    The following limits apply only when you perform management operations by using Azure Resource Manager with Azure Storage. The limits apply per region of the resource in the request.

    Resource Limit
    Storage account management operations (read) 800 per 5 minutes
    Storage account management operations (write) 10 per second / 1200 per hour
    Storage account management operations (list) 100 per 5 minutes

    Azure Blob Storage limits

    Resource Target
    Maximum size of single blob container Same as maximum storage account capacity
    Maximum number of blocks in a block blob or append blob 50,000 blocks
    Maximum size of a block in a block blob 4000 MiB
    Maximum size of a block blob 50,000 X 4000 MiB (approximately 190.7 TiB)
    Maximum size of a block in an append blob 4 MiB
    Maximum size of an append blob 50,000 x 4 MiB (approximately 195 GiB)
    Maximum size of a page blob 8 TiB2
    Maximum number of stored access policies per blob container 5
    Target request rate for a single blob Up to 500 requests per second
    Target throughput for a single page blob Up to 60 MiB per second2
    Target throughput for a single block blob Up to storage account ingress/egress limits1

    1 Throughput for a single blob depends on several factors. These factors include but aren't limited to: concurrency, request size, performance tier, speed of source for uploads, and destination for downloads. To take advantage of the performance enhancements of high-throughput block blobs, upload larger blobs or blocks. Specifically, call the Put Blob or Put Block operation with a blob or block size that is greater than 256 KiB.

    2 Page blobs aren't yet supported in accounts that have a hierarchical namespace enabled.

    The following table describes the maximum block and blob sizes permitted by service version.

    Service version Maximum block size (via Put Block) Maximum blob size (via Put Block List) Maximum blob size via single write operation (via Put Blob)
    Version 2019-12-12 and later 4000 MiB Approximately 190.7 TiB (4000 MiB X 50,000 blocks) 5000 MiB
    Version 2016-05-31 through version 2019-07-07 100 MiB Approximately 4.75 TiB (100 MiB X 50,000 blocks) 256 MiB
    Versions prior to 2016-05-31 4 MiB Approximately 195 GiB (4 MiB X 50,000 blocks) 64 MiB

    Azure Queue storage limits

    Resource Target
    Maximum size of a single queue 500 TiB
    Maximum size of a message in a queue 64 KiB
    Maximum number of stored access policies per queue 5
    Maximum request rate per storage account 20,000 messages per second, which assumes a 1-KiB message size
    Target throughput for a single queue (1-KiB messages) Up to 2,000 messages per second

    Azure Table storage limits

    The following table describes capacity, scalability, and performance targets for Table storage.

    Resource Target
    Number of tables in an Azure storage account Limited only by the capacity of the storage account
    Number of partitions in a table Limited only by the capacity of the storage account
    Number of entities in a partition Limited only by the capacity of the storage account
    Maximum size of a single table 500 TiB
    Maximum size of a single entity, including all property values 1 MiB
    Maximum number of properties in a table entity 255 (including the three system properties, PartitionKey, RowKey, and Timestamp)
    Maximum total size of an individual property in an entity Varies by property type. For more information, see Property Types in Understanding the Table Service Data Model.
    Size of the PartitionKey A string up to 1 KiB in size
    Size of the RowKey A string up to 1 KiB in size
    Size of an entity group transaction A transaction can include at most 100 entities and the payload must be less than 4 MiB in size. An entity group transaction can include an update to an entity only once.
    Maximum number of stored access policies per table 5
    Maximum request rate per storage account 20,000 transactions per second, which assumes a 1-KiB entity size
    Target throughput for a single table partition (1 KiB-entities) Up to 2,000 entities per second

    Azure subscription creation limits

    To learn more about the creation limits for Azure subscriptions, see Billing accounts and scopes in the Azure portal.

    Azure Virtual Desktop Service limits

    The following table describes the maximum limits for Azure Virtual Desktop.

    Azure Virtual Desktop Object Per Parent Container Object Service Limit
    Workspace Microsoft Entra tenant 1300
    HostPool Workspace 400
    Application group Microsoft Entra tenant 5001
    RemoteApp Application group 500
    Role Assignment Any Azure Virtual Desktop Object 200
    Session Host HostPool 10,000

    1If you require over 500 Application groups then please raise a support ticket via the Azure portal.

    All other Azure resources used in Azure Virtual Desktop such as Virtual Machines, Storage, Networking etc. are all subject to their own resource limitations documented in the relevant sections of this article. To visualise the relationship between all the Azure Virtual Desktop objects, review this article Relationships between Azure Virtual Desktop logical components.

    To get started with Azure Virtual Desktop, use the getting started guide. For deeper architectural content for Azure Virtual Desktop, use the Azure Virtual Desktop section of the Cloud Adoption Framework. For pricing information for Azure Virtual Desktop, add "Azure Virtual Desktop" within the Compute section of the Azure Pricing Calculator.

    Azure VMware Solution limits

    The following table describes the maximum limits for Azure VMware Solution.

    Resource Limit
    vSphere clusters per private cloud 12
    Minimum number of ESXi hosts per cluster 3 (hard-limit)
    Maximum number of ESXi hosts per cluster 16 (hard-limit)
    Maximum number of ESXi hosts per private cloud 96
    Maximum number of vCenter Servers per private cloud 1 (hard-limit)
    Maximum number of HCX site pairings 25 (any edition)
    Maximum number of HCX service meshes 10 (any edition)
    Maximum number of Azure VMware Solution ExpressRoute linked private clouds from a single location to a single Virtual Network Gateway 4
    The virtual network gateway used determines the actual max linked private clouds. For more information, see About ExpressRoute virtual network gateways
    If you exceed this threshold use Azure VMware Solution Interconnect to aggregate private cloud connectivity within the Azure region.
    Maximum Azure VMware Solution ExpressRoute port speed 10 Gbps (use Ultra Performance Gateway SKU with FastPath enabled)
    The virtual network gateway used determines the actual bandwidth. For more information, see About ExpressRoute virtual network gateways
    Maximum number of Azure Public IPv4 addresses assigned to NSX-T Data Center 2,000
    Maximum number of Azure VMware Solution Interconnects per private cloud 10
    vSAN capacity limits 75% of total usable (keep 25% available for SLA)
    VMware Site Recovery Manager - Maximum number of protected Virtual Machines 3,000
    VMware Site Recovery Manager - Maximum number of Virtual Machines per recovery plan 2,000
    VMware Site Recovery Manager - Maximum number of protection groups per recovery plan 250
    VMware Site Recovery Manager - RPO Values 5 min or higher * (hard-limit)
    VMware Site Recovery Manager - Maximum number of virtual machines per protection group 500
    VMware Site Recovery Manager - Maximum number of recovery plans 250

    * For information about Recovery Point Objective (RPO) lower than 15 minutes, see How the 5 Minute Recovery Point Objective Works in the vSphere Replication Administration guide.

    For other VMware-specific limits, use the VMware configuration maximum tool.

    Azure Web PubSub limits

    Resource Default limit Maximum limit
    Azure Web PubSub Service units per instance for Free tier 1 1
    Azure Web PubSub Service units per instance for Standard/Premium_P1 tier 100 100
    Azure Web PubSub Service units per instance for Premium_P2 tier 100 - 1,000 100 - 1,000
    Azure Web PubSub Service units per subscription per region for Free tier 5 5
    Total Azure Web PubSub Service unit counts per subscription per region 150 Unlimited
    Concurrent connections per unit for Free tier 20 20
    Concurrent connections per unit for Standard/Premium tier 1,000 1,000
    Included messages per unit per day for Free tier 20,000 20,000
    Additional messages per unit per day for Free tier 0 0
    Included messages per unit per day for Standard/Premium tier 1,000,000 1,000,000
    Additional messages per unit per day for Standard/Premium tier Unlimited Unlimited

    To request an update to your subscription's default limits, open a support ticket.

    For more information about how connections and messages are counted in billing, see Billing model in Azure Web PubSub Service.

    If your requirements exceed the limits, scale up from Free tier to Standard/Premium tier or scale out units. For more information, see How to scale an Azure Web PubSub Service instance.

    If your requirements exceed the limits of a single instance, add instances. For more information, see How to use Geo-Replication in Azure Web PubSub.

    Backup limits

    For a summary of Azure Backup support settings and limitations, see Azure Backup Support Matrices.

    Batch limits

    Resource Default limit Maximum limit
    Azure Batch accounts per region per subscription 1-3 50
    Dedicated cores per Batch account 0-9001 Contact support
    Low-priority cores per Batch account 0-1001 Contact support
    Active jobs and job schedules per Batch account (completed jobs have no limit) 100-300 1,0002
    Pools per Batch account 0-1001 5002
    Private endpoint connections per Batch account 100 100

    1 For capacity management purposes, the default quotas for new Batch accounts in some regions and for some subscription types have been reduced from the above range of values. In some cases, these limits have been reduced to zero. When you create a new Batch account, check your quotas and request an appropriate core or service quota increase, if necessary. Alternatively, consider reusing Batch accounts that already have sufficient quota or user subscription pool allocation Batch accounts to maintain core and VM family quota across all Batch accounts on the subscription. Service quotas like active jobs or pools apply to each distinct Batch account even for user subscription pool allocation Batch accounts.

    2 To request an increase beyond this limit, contact Azure Support.

    Note

    Default limits vary depending on the type of subscription you use to create a Batch account. Cores quotas shown are for Batch accounts in Batch service mode. View the quotas in your Batch account.

    Classic deployment model limits

    If you use classic deployment model instead of the Azure Resource Manager deployment model, the following limits apply.

    Resource Default limit Maximum limit
    vCPUs per subscription1 20 10,000
    Coadministrators per subscription 200 200
    Storage accounts per subscription2 100 100
    Cloud services per subscription 20 200
    Local networks per subscription 10 500
    DNS servers per subscription 9 100
    Reserved IPs per subscription 20 100
    Affinity groups per subscription 256 256
    Subscription name length (characters) 64 64

    1Extra small instances count as one vCPU toward the vCPU limit despite using a partial CPU core.

    2The storage account limit includes both Standard and Premium storage accounts.

    Container Instances limits

    Resource Actual Limit
    Standard sku container groups per region per subscription 100
    Dedicated sku container groups per region per subscription 01
    Number of containers per container group 60
    Number of volumes per container group 20
    Standard sku cores (CPUs) per region per subscription 100
    Standard sku cores (CPUs) for K80 GPU per region per subscription 0
    Standard sku cores (CPUs) for V100 GPU per region per subscription 0
    Ports per IP 5
    Container instance log size - running instance 4 MB
    Container instance log size - stopped instance 16 KB or 1,000 lines
    Container group creates per hour 3001
    Container group creates per 5 minutes 1001
    Container group deletes per hour 3001
    Container group deletes per 5 minutes 1001

    1To request a limit increase, create an Azure Support request. Free subscriptions including Azure Free Account and Azure for Students aren't eligible for limit or quota increases. If you have a free subscription, you can upgrade to a Pay-As-You-Go subscription.
    2Default limit for Pay-As-You-Go subscription. Limit may differ for other category types.

    Container Registry limits

    The following table details the features and limits of the Basic, Standard, and Premium service tiers.

    Resource Basic Standard Premium
    Included storage1 (GiB) 10 100 500
    Storage limit (TiB) 20 20 20
    Maximum image layer size (GiB) 200 200 200
    Maximum manifest size (MiB) 4 4 4
    ReadOps per minute2, 3 1,000 3,000 10,000
    WriteOps per minute2, 4 100 500 2,000
    Download bandwidth2 (Mbps) 30 60 100
    Upload bandwidth 2 (Mbps) 10 20 50
    Webhooks 2 10 500
    Geo-replication N/A N/A Supported
    Availability zones N/A N/A Supported
    Content trust N/A N/A Supported
    Private link with private endpoints N/A N/A Supported
    • Private endpoints N/A N/A 200
    Public IP network rules N/A N/A 100
    Service endpoint VNet access N/A N/A Preview
    • Virtual network rules N/A N/A 100
    Customer-managed keys N/A N/A Supported
    Repository-scoped permissions Supported Supported Supported
    • Tokens 100 500 50,000
    • Scope maps 100 500 50,000
    • Actions 500 500 500
    • Repositories per scope map5 500 500 500
    Anonymous pull access N/A Preview Preview

    1 Storage included in the daily rate for each tier. Additional storage may be used, up to the registry storage limit, at an additional daily rate per GiB. For rate information, see Azure Container Registry pricing. If you need storage beyond the registry storage limit, please contact Azure Support.

    2ReadOps, WriteOps, and Bandwidth are minimum estimates. Azure Container Registry strives to improve performance as usage requires. Both resources, ACR, and the device must be in the same region to achieve a fast download speed.

    3A docker pull translates to multiple read operations based on the number of layers in the image, plus the manifest retrieval.

    4A docker push translates to multiple write operations, based on the number of layers that must be pushed. A docker push includes ReadOps to retrieve a manifest for an existing image.

    5 Individual actions of content/delete, content/read, content/write, metadata/read, metadata/write corresponds to the limit of Repositories per scope map.

    Content Delivery Network limits

    Resource Limit
    Azure Content Delivery Network profiles 25
    Content Delivery Network endpoints per profile 25
    Custom domains per endpoint 25
    Maximum origin group per profile 10
    Maximum origin per origin group 10
    Maximum number of rules per CDN endpoint 25
    Maximum number of match conditions per rule 10
    Maximum number of actions per rule 5
    Maximum bandwidth per profile* 75 Gbps
    Maximum requests per second per profile 100,000
    HTTP header size limit (per header) 32 KB

    *These two limits are only applicable to Azure CDN Standard from Microsoft (classic). If the traffic is not globally distributed and concentrated in one or two regions, or if a higher quota limit is needed, create an Azure Support request.

    A Content Delivery Network subscription can contain one or more Content Delivery Network profiles. A Content Delivery Network profile can contain one or more Content Delivery Network endpoints. You might want to use multiple profiles to organize your Content Delivery Network endpoints by internet domain, web application, or some other criteria.

    Data Lake Analytics limits

    Azure Data Lake Analytics makes the complex task of managing distributed infrastructure and complex code easy. It dynamically provisions resources, and you can use it to do analytics on exabytes of data. When the job completes, it winds down resources automatically. You pay only for the processing power that was used. As you increase or decrease the size of data stored or the amount of compute used, you don't have to rewrite code. To raise the default limits for your subscription, contact support.

    Resource Limit Comments
    Maximum number of concurrent jobs 20
    Maximum number of analytics units (AUs) per account 250 Use any combination of up to a maximum of 250 AUs across 20 jobs. To increase this limit, contact Microsoft Support.
    Maximum script size for job submission 3 MB
    Maximum number of Data Lake Analytics accounts per region per subscription 5 To increase this limit, contact Microsoft Support.

    Data Factory limits

    Azure Data Factory is a multitenant service that has the following default limits in place to make sure customer subscriptions are protected from each other's workloads. To raise the limits up to the maximum for your subscription, contact support.

    Resource Default limit Maximum limit
    Total number of entities, such as pipelines, data sets, triggers, linked services, Private Endpoints, and integration runtimes, within a data factory 5,000 Find out how to request a quota increase from support.
    Total CPU cores for Azure-SSIS Integration Runtimes under one subscription 64 Find out how to request a quota increase from support.
    Concurrent pipeline runs per data factory that's shared among all pipelines in the factory 10,000 10,000
    Concurrent External activity runs per subscription per Azure Integration Runtime region
    External activities are managed on integration runtime but execute on linked services, including Databricks, stored procedure, Web, and others. This limit does not apply to Self-hosted IR.
    3,000 3,000
    Concurrent Pipeline activity runs per subscription per Azure Integration Runtime region
    Pipeline activities execute on integration runtime, including Lookup, GetMetadata, and Delete. This limit does not apply to Self-hosted IR.
    1,000 1,000
    Concurrent authoring operations per subscription per Azure Integration Runtime region
    Including test connection, browse folder list and table list, preview data. This limit does not apply to Self-hosted IR.
    200 200
    Concurrent Data Integration Units1 consumption per subscription per Azure Integration Runtime region Region group 12: 6,000
    Region group 22: 3,000
    Region group 32: 1,500
    Region group 12: 6,000
    Region group 22: 3,000
    Region group 32: 1,500
    Concurrent Data Integration Units1 consumption per subscription per Azure Integration Runtime region in managed virtual network 2,400 Find out how to request a quota increase from support.
    Maximum activities per pipeline, which includes inner activities for containers 40 40
    Maximum number of linked integration runtimes that can be created against a single self-hosted integration runtime 100 100
    Maximum number of nodes that can be created against a single self-hosted integration runtime 4 Find out how to request a quota increase from support.
    Maximum parameters per pipeline 50 50
    ForEach items 100,000 100,000
    ForEach parallelism 20 50
    Maximum queued runs per pipeline 100 100
    Characters per expression 8,192 8,192
    Minimum tumbling window trigger interval 5 min 15 min
    Minimum timeout for pipeline activity runs 10 min 10 min
    Maximum timeout for pipeline activity runs 7 days 7 days
    Bytes per object for pipeline objects3 200 KB 200 KB
    Bytes per object for dataset and linked service objects3 100 KB 2,000 KB
    Bytes per payload for each activity run4 896 KB 896 KB
    Data Integration Units1 per copy activity run 256 256
    Write API calls 1,200/h 1,200/h

    This limit is imposed by Azure Resource Manager, not Azure Data Factory.
    Read API calls 12,500/h 12,500/h

    This limit is imposed by Azure Resource Manager, not Azure Data Factory.
    Monitoring queries per minute 1,000 1,000
    Maximum time of data flow debug session 8 hrs 8 hrs
    Concurrent number of data flows per integration runtime 50 Find out how to request a quota increase from support.
    Concurrent number of data flows per integration runtime in managed vNet 50 Find out how to request a quota increase from support.
    Concurrent number of data flow debug sessions per user per factory 3 3
    Data Flow Azure IR TTL limit 4 hrs 4 hrs
    Meta Data Entity Size limit in a factory 2 GB Find out how to request a quota increase from support.

    1 The data integration unit (DIU) is used in a cloud-to-cloud copy operation, learn more from Data integration units (version 2). For information on billing, see Azure Data Factory pricing.

    2 Azure Integration Runtime is globally available to ensure data compliance, efficiency, and reduced network egress costs.

    Region group Regions
    Region group 1 Central US, East US, East US 2, North Europe, West Europe, West US, West US 2
    Region group 2 Australia East, Australia Southeast, Brazil South, Central India, Japan East, North Central US, South Central US, Southeast Asia, West Central US
    Region group 3 Other regions

    If managed virtual network is enabled, the data integration unit (DIU) in all region groups are 2,400.

    3 Pipeline, data set, and linked service objects represent a logical grouping of your workload. Limits for these objects don't relate to the amount of data you can move and process with Azure Data Factory. Data Factory is designed to scale to handle petabytes of data.

    4 The payload for each activity run includes the activity configuration, the associated dataset(s) and linked service(s) configurations if any, and a small portion of system properties generated per activity type. Limit for this payload size doesn't relate to the amount of data you can move and process with Azure Data Factory. Learn about the symptoms and recommendation if you hit this limit.

    Web service call limits

    Azure Resource Manager has limits for API calls. You can make API calls at a rate within the Azure Resource Manager API limits.

    Data Lake Storage limits

    Azure Data Lake Storage Gen2 is not a dedicated service or storage account type. It is the latest release of capabilities that are dedicated to big data analytics. These capabilities are available in a general-purpose v2 or BlockBlobStorage storage account, and you can obtain them by enabling the Hierarchical namespace feature of the account. For scale targets, see these articles.

    Azure Data Lake Storage Gen1 is a dedicated service. It's an enterprise-wide hyper-scale repository for big data analytic workloads. You can use Data Lake Storage Gen1 to capture data of any size, type, and ingestion speed in one single place for operational and exploratory analytics. There's no limit to the amount of data you can store in a Data Lake Storage Gen1 account.

    Resource Limit Comments
    Maximum number of Data Lake Storage Gen1 accounts, per subscription, per region 10 To request an increase for this limit, contact support.
    Maximum number of access ACLs, per file or folder 32 This is a hard limit. Use groups to manage access with fewer entries.
    Maximum number of default ACLs, per file or folder 32 This is a hard limit. Use groups to manage access with fewer entries.

    Data Share limits

    Azure Data Share enables organizations to simply and securely share data with their customers and partners.

    Resource Limit
    Maximum number of Data Share resources per Azure subscription 100
    Maximum number of sent shares per Data Share resource 200
    Maximum number of received shares per Data Share resource 100
    Maximum number of invitations per sent share 200
    Maximum number of share subscriptions per sent share 200
    Maximum number of datasets per share 200
    Maximum number of snapshot schedules per share 1

    Database Migration Service Limits

    Azure Database Migration Service is a fully managed service designed to enable seamless migrations from multiple database sources to Azure data platforms with minimal downtime.

    Resource Limit Comments
    Maximum number of services per subscription, per region 10 To request an increase for this limit, contact support.

    Device Update for IoT Hub limits

    Note

    When a given resource or operation doesn't have adjustable limits, the default and the maximum limits are the same. When the limit can be adjusted, the following table includes both the default limit and maximum limit. The limit can be raised above the default limit but not above the maximum limit. Limits can only be adjusted for the Standard SKU. Limit adjustment requests are not accepted for Free SKU. Limit adjustment requests are evaluated on a case-by-case basis and approvals are not guaranteed. Additionally, Free SKU instances cannot be upgraded to Standard SKU instances.

    If you want to raise the limit or quota above the default limit, open an online customer support request.

    This table provides the limits for the Device Update for IoT Hub resource in Azure Resource Manager:

    Resource Standard SKU Limit Free SKU Limit Adjustable for Standard SKU?
    Accounts per subscription 50 1 No
    Instances per account 50 1 No
    Length of account name 3-24 characters 3-24 characters No
    Length of instance name 3-36 characters 3-36 characters No

    This table provides the various limits associated with the operations within Device Update for IoT Hub:

    Operation Standard SKU Limit Free SKU Limit Adjustable for Standard SKU?
    Number of devices per instance 1 Million 10 Yes
    Number of device groups per instance 100 10 Yes
    Number of device classes per instance 80 10 Yes
    Number of active deployments per instance 50 (includes 1 reserved deployment for Cancels) 5 (includes 1 reserved deployment for Cancels) Yes
    Number of total deployments per instance (includes all active, inactive and cancelled deployments that are not deleted) 100 20 No
    Number of update providers per instance 25 2 No
    Number of update names per provider per instance 25 2 No
    Number of update versions per update provider and name per instance 100 5 No
    Total number of updates per instance 100 10 No
    Maximum single update file size 2 GB 2 GB Yes
    Maximum combined size of all files in a single import action 2 GB 2 GB Yes
    Maximum number of files in a single update 10 10 No
    Total data storage included per instance 100 GB 5 GB No

    Note

    Cancelled or Inactive deployments count towards your total deployment limit. Please ensure that these deployments are periodically cleaned up, so that you are not prevented from creating new deployments.

    Digital Twins limits

    Note

    Some areas of this service have adjustable limits, and others do not. This is represented in the following tables with the Adjustable? column. When the limit can be adjusted, the Adjustable? value is Yes.

    Functional limits

    The following table lists the functional limits of Azure Digital Twins.

    Area Capability Default limit Adjustable?
    Azure resource Number of Azure Digital Twins instances in a region, per subscription 10 Yes
    Digital twins Number of twins in an Azure Digital Twins instance 2,000,000 Yes
    Digital twins Number of digital twins that can be imported in a single Import Jobs API job 2,000,000 No
    Digital twins Number of incoming relationships to a single twin 50,000 No
    Digital twins Number of outgoing relationships from a single twin 50,000 No
    Digital twins Total number of relationships in an Azure Digital Twins instance 20,000,000 Yes
    Digital twins Number of relationships that can be imported in a single Import Jobs API job 10,000,000 No
    Digital twins Maximum size (of JSON body in a PUT or PATCH request) of a single twin 32 KB No
    Digital twins Maximum request payload size 32 KB No
    Digital twins Maximum size of a string property value (UTF-8) 4 KB No
    Digital twins Maximum size of a property name 1 KB No
    Routing Number of endpoints for a single Azure Digital Twins instance 6 No
    Routing Number of routes for a single Azure Digital Twins instance 6 Yes
    Models Number of models within a single Azure Digital Twins instance 10,000 Yes
    Models Number of models that can be imported in a single API call (not using the Import Jobs API) 250 No
    Models Number of models that can be imported in a single Import Jobs API job 10,000 No
    Models Maximum size (of JSON body in a PUT or PATCH request) of a single model 1 MB No
    Models Number of items returned in a single page 100 No
    Query Number of items returned in a single page 1000 Yes
    Query Number of AND / OR expressions in a query 50 Yes
    Query Number of array items in an IN / NOT IN clause 50 Yes
    Query Number of characters in a query 8,000 Yes
    Query Number of JOINS in a query 5 Yes

    Rate limits

    The following table reflects the rate limits of different APIs.

    API Capability Default limit Adjustable?
    Jobs API Number of requests per second 1 Yes
    Jobs API Number of bulk jobs running concurrently (including import and delete) 1 Yes
    Models API Number of requests per second 100 Yes
    Digital Twins API Number of read requests per second 1,000 Yes
    Digital Twins API Number of patch requests per second 1,000 Yes
    Digital Twins API Number of create/delete operations per second across all twins and relationships 500 Yes
    Digital Twins API Number of create/update/delete operations per second on a single twin or its incoming/outgoing relationships 10 No
    Digital Twins API Number of outstanding operations on a single twin or its incoming/outgoing relationships 500 No
    Query API Number of requests per second 500 Yes
    Query API Query Units per second 4,000 Yes
    Event Routes API Number of requests per second 100 Yes

    Other limits

    Limits on data types and fields within DTDL documents for Azure Digital Twins models can be found within its spec documentation in GitHub: Digital Twins Definition Language (DTDL) - version 2.

    Query latency details are described in Query language. Limitations of particular query language features can be found in the query reference documentation.

    Event Grid limits

    Note

    The following limits listed in this article are per region.

    Event Grid throttle limits

    Event Grid offers a standard tier and basic tier. Event Grid standard tier enables pub-sub using MQTT broker functionality and pull-delivery of messages through the Event Grid namespace. Event Grid basic tier enables push delivery using Event Grid custom topics, Event Grid system topics, Event domains, and Event Grid partner topics. See Choose the right Event Grid tier. This article describes the quota and limits for both tiers.

    Event Grid Namespace resource limits

    Azure Event Grid namespaces is available in public preview and enables MQTT messaging, and HTTP pull delivery. The following limits apply to namespace resources in Azure Event Grid.

    Limit description Limit
    Event Grid namespaces per Azure subscription 50
    Maximum throughput units per Event Grid namespace 40
    IP Firewall rules per Event Grid namespace 16

    MQTT limits in Event Grid namespace

    The following limits apply to MQTT in Azure Event Grid namespace resource.

    Limit description Limit
    MQTT sessions per Event Grid namespace 10,000 per TU
    Sessions per Event Grid namespace 10,000 per TU
    Session Expiry Interval 8 hours, configurable on the Event Grid namespace
    Inbound MQTT publish requests per Event Grid namespace 1,000 messages per second per TU
    Inbound MQTT bandwidth per Event Grid namespace 1 MB per second per TU
    Inbound MQTT publish requests per session 100 messages per second
    Inbound MQTT bandwidth per session 1 MB per second
    Outbound MQTT publish requests per Event Grid namespace 1,000 messages per second per TU
    Outbound MQTT bandwidth per Event Grid namespace 1 MB per second per TU
    Outbound MQTT publish requests per session 100 messages per second
    Outbound MQTT bandwidth per session 1 MB per second
    Max message size 512 KB
    Segments per topic/ topic filter 8
    Topic size 256 B
    MQTTv5 response topic 256 B
    MQTTv5 topic aliases 10 per session
    MQTTv5 total size of all user properties 32 KB
    MQTTv5 content type size 256 B
    MQTTv5 correlation data size 256 B
    Connect requests 200 requests per second per TU
    MQTTv5 authentication data size 8 KB
    Maximum keep-alive interval 1160
    Topic filters per MQTT SUBSCRIBE packet 10
    Subscribe and unsubscribe requests per Event Grid namespace 200 requests per second
    Subscribe and unsubscribe requests per session 5 requests per second
    Subscriptions per MQTT session 50
    Subscriptions per Event Grid namespace 1 million
    Subscriptions per MQTT topic Unlimited, as long as they don't exceed the limit for subscriptions per Event Grid namespace or session
    Registered client resources 10,000 clients per TU
    CA certificates 10
    Client groups 10
    Topic spaces 10
    Topic templates 10 per topic space
    Permission bindings 100

    Events limits in Event Grid namespace

    The following limits apply to events in Azure Event Grid namespace resource.

    Limit description Limit
    Event Grid namespace topics 100 per TU
    Event ingress 1,000 events per second or 1 MB per second per TU (whichever comes first)
    Event egress (push and pull APIs) Up to 2,000 events per second or 2 MB per second per TU
    Event egress (acknowledge, release, reject, and renew lock APIs) Up to 2,000 events per second or 2 MB per second per TU
    Maximum event retention on Event Grid namespace topics 7 days
    Subscriptions per topic 500
    Maximum event size 1 MB
    Batch size 1 MB
    Events per request 1,000

    Custom topic, system topic, and partner topic resource limits

    The following limits apply to Azure Event Grid custom topic, system topic, and partner topic resources.

    Limit description Limit
    Custom topics per Azure subscription 100
    When the limit is reached, you can consider a different region or consider using domains, which can support 100,000 topics.
    Event subscriptions per topic 500
    This limit can’t be increased.
    Publish rate for a custom or a partner topic (ingress) 5,000 events of 64 KB size per second or 5 MB per second (whichever comes first). An event is counted for limits and pricing purposes as a 64KB data chunk. So, if the event is 128KB, it counts as two events.
    Event size 1 MB
    This limit can’t be increased.
    Maximum event retention on topics 1 day. This limit can't be increased.
    Number of incoming events per batch 5,000
    This limit can’t be increased
    Private endpoint connections per topic 64
    This limit can’t be increased
    IP Firewall rules per topic 128

    Domain resource limits

    The following limits apply to Azure Event Grid domain resource.

    Limit description Limit
    Domains per Azure subscription 100
    Topics per domain 100,000
    Event subscriptions per topic within a domain 500
    This limit can’t be increased
    Domain scope event subscriptions 50
    This limit can’t be increased
    Publish rate for a domain (ingress) 5,000 events of 64 KB size per second or 5 MB per second (whichever comes first). An event is counted for limits and pricing purposes as a 64KB data chunk. So, if the event is 128KB, it counts as two events.
    Maximum event retention on domain topics 1 day. This limit can't be increased.
    Private endpoint connections per domain 64
    IP Firewall rules per topic 128

    Event Hubs limits

    The following tables provide quotas and limits specific to Azure Event Hubs. For information about Event Hubs pricing, see Event Hubs pricing.

    Common limits for all tiers

    The following limits are common across all tiers.

    Limit Notes Value
    Size of an event hub name - 256 characters
    Size of a consumer group name Kafka protocol doesn't require the creation of a consumer group.

    Kafka: 256 characters

    AMQP: 50 characters

    Number of non-epoch receivers per consumer group - 5
    Number of authorization rules per namespace Subsequent requests for authorization rule creation are rejected. 12
    Number of calls to the GetRuntimeInformation method - 50 per second
    Number of virtual networks (VNet) - 128
    Number of IP Config rules - 128
    Maximum length of a schema group name 50
    Maximum length of a schema name 100
    Size in bytes per schema 1 MB
    Number of properties per schema group 1024
    Size in bytes per schema group property key 256
    Size in bytes per schema group property value 1024

    Basic vs. standard vs. premium vs. dedicated tiers

    The following table shows limits that are different for basic, standard, premium, and dedicated tiers.

    Note

    • In the table, CU is capacity unit, PU is processing unit, and TU is throughput unit.
    • You can configure TUs for a basic or standard tier namespace or PUs for a premium tier namespace.
    • When you create a dedicated cluster, 1 CU is assigned to the cluster. If you enable the Support Scaling option while creating the cluster, you'll be able to scale out by increasing CUs or scale in by decreasing CUs for the cluster yourself. For step-by-step instructions, see Scale dedicated cluster. For clusters that don't support the Support Scaling feature, submit a ticket To adjust CUs for the cluster.
    Limit Basic Standard Premium Dedicated
    Maximum size of Event Hubs publication 256 KB 1 MB 1 MB 1 MB
    Number of consumer groups per event hub 1 20 100 1000
    No limit per CU
    Number of Kafka consumer groups per Namespace NA 1000 1000 1000
    Number of brokered connections per namespace 100 5,000 10000 per PU

    For example, if the namespace is assigned 3 PUs, the limit is 30000.
    100, 000 per CU
    Maximum retention period of event data 1 day 7 days 90 days 90 days
    Event storage for retention 84 GB per TU 84 GB per TU 1 TB per PU 10 TB per CU
    Maximum TUs or PUs or CUs 40 TUs 40 TUs 16 PUs 20 CUs
    Number of partitions per event hub 32 32 100 per event hub, but there's a limit of 200 per PU at the namespace level.

    For example, if a namespace is assigned 2 PUs, the limit for total number of partitions in all event hubs in the namespace is 2 * 200 = 400.
    1024 per event hub
    2000 per CU
    Number of namespaces per subscription 1000 1000 1000 1000 (50 per CU)
    Number of event hubs per namespace 10 10 100 per PU 1000
    Capture N/A Pay per hour Included Included
    Size of compacted event hub N/A 1 GB per partition 250 GB per partition 250 GB per partition
    Size of the schema registry (namespace) in mega bytes N/A 25 100 1024
    Number of schema groups in a schema registry or namespace N/A 1 - excluding the default group 100
    1 MB per schema
    1000
    1 MB per schema
    Number of schema versions across all schema groups N/A 25 1000 10000
    Throughput per unit Ingress - 1 MB/s or 1000 events per second
    Egress – 2 MB/s or 4,096 events per second
    Ingress - 1 MB/s or 1000 events per second
    Egress – 2 MB/s or 4,096 events per second
    No limits per PU * No limits per CU *

    * Depends on various factors such as resource allocation, number of partitions, storage, and so on.

    Note

    You can publish events individually or batched. The publication limit (according to SKU) applies regardless of whether it is a single event or a batch. Publishing events larger than the maximum threshold will be rejected.

    IoT Central limits

    IoT Central limits the number of applications you can deploy in a subscription to 100. If you need to increase this limit, contact Microsoft support. To learn more, see Azure IoT Central quota and limits.

    IoT Hub limits

    The following table lists the limits associated with the different service tiers S1, S2, S3, and F1. For information about the cost of each unit in each tier, see Azure IoT Hub pricing.

    Resource S1 Standard S2 Standard S3 Standard F1 Free
    Messages/day 400,000 6,000,000 300,000,000 8,000
    Maximum units 200 200 10 1

    Note

    If you anticipate using more than 200 units with an S1 or S2 tier hub or 10 units with an S3 tier hub, contact Microsoft Support.

    The following table lists the limits that apply to IoT Hub resources.

    Resource Limit
    Maximum paid IoT hubs per Azure subscription 50
    Maximum free IoT hubs per Azure subscription 1
    Maximum number of characters in a device ID 128
    Maximum number of device identities
    returned in a single call
    1,000
    IoT Hub message maximum retention for device-to-cloud messages 7 days
    Maximum size of device-to-cloud message 256 KB
    Maximum size of device-to-cloud batch AMQP and HTTP: 256 KB for the entire batch
    MQTT: 256 KB for each message
    Maximum messages in device-to-cloud batch 500
    Maximum size of cloud-to-device message 64 KB
    Maximum TTL for cloud-to-device messages 2 days
    Maximum delivery count for cloud-to-device
    messages
    100
    Maximum cloud-to-device queue depth per device 50
    Maximum delivery count for feedback messages
    in response to a cloud-to-device message
    100
    Maximum TTL for feedback messages in
    response to a cloud-to-device message
    2 days
    Maximum size of device twin 8 KB for tags section, and 32 KB for desired and reported properties sections each
    Maximum length of device twin string key 1 KB
    Maximum length of device twin string value 4 KB
    Maximum depth of object in device twin 10
    Maximum size of direct method payload 128 KB
    Job history maximum retention 30 days
    Maximum concurrent jobs 10 (for S3), 5 for (S2), 1 (for S1)
    Maximum additional endpoints (beyond built-in endpoints) 10 (for S1, S2, and S3)
    Maximum message routing rules 100 (for S1, S2, and S3)
    Maximum number of concurrently connected device streams 50 (for S1, S2, S3, and F1 only)
    Maximum device stream data transfer 300 MB per day (for S1, S2, S3, and F1 only)

    Note

    If you need more than 50 paid IoT hubs in an Azure subscription, contact Microsoft Support.

    Note

    Currently, the total number of devices plus modules that can be registered to a single IoT hub is capped at 1,000,000. If you want to increase this limit, contact Microsoft Support.

    IoT Hub throttles requests when the following quotas are exceeded.

    Throttle Per-hub value
    Identity registry operations
    (create, retrieve, list, update, and delete),
    individual or bulk import/export
    83.33/sec/unit (5,000/min/unit) (for S3).
    1.67/sec/unit (100/min/unit) (for S1 and S2).
    Device connections 6,000/sec/unit (for S3), 120/sec/unit (for S2), 12/sec/unit (for S1).
    Minimum of 100/sec.
    Device-to-cloud sends 6,000/sec/unit (for S3), 120/sec/unit (for S2), 12/sec/unit (for S1).
    Minimum of 100/sec.
    Cloud-to-device sends 83.33/sec/unit (5,000/min/unit) (for S3), 1.67/sec/unit (100/min/unit) (for S1 and S2).
    Cloud-to-device receives 833.33/sec/unit (50,000/min/unit) (for S3), 16.67/sec/unit (1,000/min/unit) (for S1 and S2).
    File upload operations 83.33 file upload initiations/sec/unit (5,000/min/unit) (for S3), 1.67 file upload initiations/sec/unit (100/min/unit) (for S1 and S2).
    10 concurrent file uploads per device.
    Direct methods 24 MB/sec/unit (for S3), 480 KB/sec/unit (for S2), 160 KB/sec/unit (for S1).
    Based on 8-KB throttling meter size.
    Device twin reads 500/sec/unit (for S3), Maximum of 100/sec or 10/sec/unit (for S2), 100/sec (for S1)
    Device twin updates 250/sec/unit (for S3), Maximum of 50/sec or 5/sec/unit (for S2), 50/sec (for S1)
    Jobs operations
    (create, update, list, and delete)
    83.33/sec/unit (5,000/min/unit) (for S3), 1.67/sec/unit (100/min/unit) (for S2), 1.67/sec/unit (100/min/unit) (for S1).
    Jobs per-device operation throughput 50/sec/unit (for S3), maximum of 10/sec or 1/sec/unit (for S2), 10/sec (for S1).
    Device stream initiation rate 5 new streams/sec (for S1, S2, S3, and F1 only).

    IoT Hub Device Provisioning Service limits

    The following table lists the limits that apply to Azure IoT Hub Device Provisioning Service resources.

    Resource Limit Adjustable?
    Maximum device provisioning services per Azure subscription 10 No
    Maximum number of registrations 1,000,000 No
    Maximum number of individual enrollments 1,000,000 No
    Maximum number of enrollment groups (X.509 certificate) 100 No
    Maximum number of enrollment groups (symmetric key) 100 No
    Maximum number of CAs 25 No
    Maximum number of linked IoT hubs 50 No
    Maximum size of message 96 KB No

    Tip

    If the hard limit on symmetric key enrollment groups is a blocking issue, it is recommended to use individual enrollments as a workaround.

    The Device Provisioning Service has the following rate limits.

    Rate Per-unit value Adjustable?
    Operations 1,000/min/service No
    Device registrations 1,000/min/service No
    Device polling operation 5/10 sec/device No

    Key Vault limits

    Azure Key Vault service supports two resource types: Vaults and Managed HSMs. The following two sections describe the service limits for each of them respectively.

    Resource type: vault

    This section describes service limits for resource type vaults.

    Key transactions (maximum transactions allowed in 10 seconds, per vault per region1):

    Key type HSM key
    CREATE key
    HSM key
    All other transactions
    Software key
    CREATE key
    Software key
    All other transactions
    RSA 2,048-bit 10 2,000 20 4,000
    RSA 3,072-bit 10 500 20 1,000
    RSA 4,096-bit 10 250 20 500
    ECC P-256 10 2,000 20 4,000
    ECC P-384 10 2,000 20 4,000
    ECC P-521 10 2,000 20 4,000
    ECC SECP256K1 10 2,000 20 4,000

    Note

    In the previous table, we see that for RSA 2,048-bit software keys, 4,000 GET transactions per 10 seconds are allowed. For RSA 2,048-bit HSM-keys, 2,000 GET transactions per 10 seconds are allowed.

    The throttling thresholds are weighted, and enforcement is on their sum. For example, as shown in the previous table, when you perform GET operations on RSA HSM-keys, it's eight times more expensive to use 4,096-bit keys compared to 2,048-bit keys. That's because 2,000/250 = 8.

    In a given 10-second interval, an Azure Key Vault client can do only one of the following operations before it encounters a 429 throttling HTTP status code:

    • 4,000 RSA 2,048-bit software-key GET transactions
    • 2,000 RSA 2,048-bit HSM-key GET transactions
    • 250 RSA 4,096-bit HSM-key GET transactions
    • 248 RSA 4,096-bit HSM-key GET transactions and 16 RSA 2,048-bit HSM-key GET transactions

    Secrets, managed storage account keys, and vault transactions:

    Transactions type Maximum transactions allowed in 10 seconds, per vault per region1
    Secret
    CREATE secret
    300
    All other transactions 4,000

    For information on how to handle throttling when these limits are exceeded, see Azure Key Vault throttling guidance.

    1 A subscription-wide limit for all transaction types is five times per key vault limit.

    Backup keys, secrets, certificates

    When you back up a key vault object, such as a secret, key, or certificate, the backup operation will download the object as an encrypted blob. This blob cannot be decrypted outside of Azure. To get usable data from this blob, you must restore the blob into a key vault within the same Azure subscription and Azure geography

    Transactions type Maximum key vault object versions allowed
    Back up individual key, secret, certificate 500

    Note

    Attempting to backup a key, secret, or certificate object with more versions than above limit will result in an error. It is not possible to delete previous versions of a key, secret, or certificate.

    Limits on count of keys, secrets and certificates:

    Key Vault does not restrict the number of keys, secrets or certificates that can be stored in a vault. The transaction limits on the vault should be taken into account to ensure that operations are not throttled.

    Key Vault does not restrict the number of versions on a secret, key or certificate, but storing a large number of versions (500+) can impact the performance of backup operations. See Azure Key Vault Backup.

    Resource type: Managed HSM

    This section describes service limits for resource type managed HSM.

    Object limits

    Item Limits
    Number of HSM instances per subscription per region 5
    Number of keys per HSM instance 5000
    Number of versions per key 100
    Number of custom role definitions per HSM instance 50
    Number of role assignments at HSM scope 50
    Number of role assignments at each individual key scope 10

    Transaction limits for administrative operations (number of operations per second per HSM instance)

    Operation Number of operations per second
    All RBAC operations
    (includes all CRUD operations for role definitions and role assignments)
    5
    Full HSM Backup/Restore
    (only one concurrent backup or restore operation per HSM instance supported)
    1

    Transaction limits for cryptographic operations (number of operations per second per HSM instance)

    • Each Managed HSM instance constitutes three load balanced HSM partitions. The throughput limits are a function of underlying hardware capacity allocated for each partition. The tables below show maximum throughput with at least one partition available. Actual throughput may be up to 3x higher if all three partitions are available.
    • Throughput limits noted assume that one single key is being used to achieve maximum throughput. For example, if a single RSA-2048 key is used the maximum throughput will be 1100 sign operations. If you use 1100 different keys with one transaction per second each, they will not be able to achieve the same throughput.
    RSA key operations (number of operations per second per HSM instance)
    Operation 2048-bit 3072-bit 4096-bit
    Create Key 1 1 1
    Delete Key (soft-delete) 10 10 10
    Purge Key 10 10 10
    Backup Key 10 10 10
    Restore Key 10 10 10
    Get Key Information 1100 1100 1100
    Encrypt 10000 10000 6000
    Decrypt 1100 360 160
    Wrap 10000 10000 6000
    Unwrap 1100 360 160
    Sign 1100 360 160
    Verify 10000 10000 6000
    EC key operations (number of operations per second per HSM instance)

    This table describes number of operations per second for each curve type.

    Operation P-256 P-256K P-384 P-521
    Create Key 1 1 1 1
    Delete Key (soft-delete) 10 10 10 10
    Purge Key 10 10 10 10
    Backup Key 10 10 10 10
    Restore Key 10 10 10 10
    Get Key Information 1100 1100 1100 1100
    Sign 260 260 165 56
    Verify 130 130 82 28
    AES key operations (number of operations per second per HSM instance)
    • Encrypt and Decrypt operations assume a 4KB packet size.
    • Throughput limits for Encrypt/Decrypt apply to AES-CBC and AES-GCM algorithms.
    • Throughput limits for Wrap/Unwrap apply to AES-KW algorithm.
    Operation 128-bit 192-bit 256-bit
    Create Key 1 1 1
    Delete Key (soft-delete) 10 10 10
    Purge Key 10 10 10
    Backup Key 10 10 10
    Restore Key 10 10 10
    Get Key Information 1100 1100 1100
    Encrypt 8000 8000 8000
    Decrypt 8000 8000 8000
    Wrap 9000 9000 9000
    Unwrap 9000 9000 9000

    Managed identity limits

    • Each managed identity counts towards the object quota limit in a Microsoft Entra tenant as described in Microsoft Entra service limits and restrictions.

    • The rate at which managed identities can be created have the following limits:

      1. Per Microsoft Entra tenant per Azure region: 400 create operations per 20 seconds.
      2. Per Azure Subscription per Azure region : 80 create operations per 20 seconds.
    • The rate at which a user-assigned managed identity can be assigned with an Azure resource :

      1. Per Microsoft Entra tenant per Azure region: 400 assignment operations per 20 seconds.
      2. Per Azure Subscription per Azure region : 300 assignment operations per 20 seconds.

    Media Services limits

    Note

    For resources that aren't fixed, open a support ticket to ask for an increase in the quotas. Don't create additional Azure Media Services accounts in an attempt to obtain higher limits.

    Account limits

    Resource Default Limit
    Media Services accounts in a single subscription 100 (fixed)

    Asset limits

    Resource Default Limit
    Assets per Media Services account 1,000,000

    Storage (media) limits

    Resource Default Limit
    File size In some scenarios, there is a limit on the maximum file size supported for processing in Media Services. (1)
    Storage accounts 100(2) (fixed)

    1 The maximum size supported for a single blob is currently up to 5 TB in Azure Blob Storage. Additional limits apply in Media Services based on the VM sizes that are used by the service. The size limit applies to the files that you upload and also the files that get generated as a result of Media Services processing (encoding or analyzing). If your source file is larger than 260-GB, your Job will likely fail.

    2 The storage accounts must be from the same Azure subscription.

    Jobs (encoding & analyzing) limits

    Resource Default Limit
    Jobs per Media Services account 500,000 (3) (fixed)
    Job inputs per Job 50 (fixed)
    Job outputs per Job 20 (fixed)
    Transforms per Media Services account 100 (fixed)
    Transform outputs in a Transform 20 (fixed)
    Files per job input 10 (fixed)

    3 This number includes queued, finished, active, and canceled Jobs. It does not include deleted Jobs.

    Any Job record in your account older than 90 days will be automatically deleted, even if the total number of records is below the maximum quota.

    Live streaming limits

    Resource Default Limit
    Live Events (4) per Media Services account 5
    Live Outputs per Live Event 3 (5)
    Max Live Output duration Size of the DVR window

    4 For detailed information about Live Event limitations, see Live Event types comparison and limitations.

    5 Live Outputs start on creation and stop when deleted.

    Packaging & delivery limits

    Resource Default Limit
    Streaming Endpoints (stopped or running) per Media Services account 2
    Dynamic Manifest Filters 100
    Streaming Policies 100 (6)
    Unique Streaming Locators associated with an Asset at one time 100(7) (fixed)

    6 When using a custom Streaming Policy, you should design a limited set of such policies for your Media Service account, and re-use them for your StreamingLocators whenever the same encryption options and protocols are needed. You should not be creating a new Streaming Policy for each Streaming Locator.

    7 Streaming Locators are not designed for managing per-user access control. To give different access rights to individual users, use Digital Rights Management (DRM) solutions.

    Protection limits

    Resource Default Limit
    Options per Content Key Policy 30
    Licenses per month for each of the DRM types on Media Services key delivery service per account 1,000,000

    Support ticket

    For resources that are not fixed, you may ask for the quotas to be raised, by opening a support ticket. Include detailed information in the request on the desired quota changes, use-case scenarios, and regions required.
    Do not create additional Azure Media Services accounts in an attempt to obtain higher limits.

    Media Services v2 (legacy)

    For limits specific to Media Services v2 (legacy), see Media Services v2 (legacy)

    Mobile Services limits

    Tier Free Basic Standard
    API calls 500,000 1.5 million per unit 15 million per unit
    Active devices 500 Unlimited Unlimited
    Scale N/A Up to 6 units Unlimited units
    Push notifications Azure Notification Hubs Free tier included, up to 1 million pushes Notification Hubs Basic tier included, up to 10 million pushes Notification Hubs Standard tier included, up to 10 million pushes
    Real-time messaging/
    WebSockets
    Limited 350 per mobile service Unlimited
    Offline synchronizations Limited Included Included
    Scheduled jobs Limited Included Included
    Azure SQL Database (required)
    Standard rates apply for additional capacity
    20 MB included 20 MB included 20 MB included
    CPU capacity 60 minutes per day Unlimited Unlimited
    Outbound data transfer 165 MB per day (daily rollover) Included Included

    For more information on limits and pricing, see Azure Mobile Services pricing.

    Multifactor authentication limits

    Resource Default limit Maximum limit
    Maximum number of trusted IP addresses or ranges per subscription 0 50
    Remember my devices, number of days 14 60
    Maximum number of app passwords 0 No limit
    Allow X attempts during MFA call 1 99
    Two-way text message timeout seconds 60 600
    Default one-time bypass seconds 300 1,800
    Lock user account after X consecutive MFA denials Not set 99
    Reset account lockout counter after X minutes Not set 9,999
    Unlock account after X minutes Not set 9,999

    Networking limits

    Networking limits - Azure Resource Manager

    The following limits apply only for networking resources managed through Azure Resource Manager per region per subscription. Learn how to view your current resource usage against your subscription limits.

    Note

    We have increased all default limits to their maximum limits. If there's no maximum limit column, the resource doesn't have adjustable limits. If you had these limits manually increased by support in the past and are currently seeing limits lower than what is listed in the following tables, open an online customer support request at no charge

    Resource Limit
    Virtual networks 1,000
    Subnets per virtual network 3,000
    Virtual network peerings per virtual network 500
    Virtual network gateways (VPN gateways) per virtual network 1
    Virtual network gateways (ExpressRoute gateways) per virtual network 1
    DNS servers per virtual network 20
    Private IP addresses per virtual network 65,536
    Total Private Addresses for a group of Peered Virtual networks 128,000
    Private IP addresses per network interface 256
    Private IP addresses per virtual machine 256
    Public IP addresses per network interface 256
    Public IP addresses per virtual machine 256
    Concurrent TCP or UDP flows per NIC of a virtual machine or role instance 500,000
    Network interface cards 65,536
    Network Security Groups 5,000
    NSG rules per NSG 1,000
    IP addresses and ranges specified for source or destination in a security group (The limit applies separately to source and destination) 4,000
    Application security groups 3,000
    Application security groups per IP configuration, per NIC 20
    Application security groups referenced as source/destination per NSG rule 10
    IP configurations per application security group 4,000
    Application security groups that can be specified within all security rules of a network security group 100
    User-defined route tables 200
    User-defined routes per route table 400
    Point-to-site root certificates per Azure VPN Gateway 20
    Point-to-site revoked client certificates per Azure VPN Gateway 300
    Virtual network TAPs 100
    Network interface TAP configurations per virtual network TAP 100

    Public IP address limits

    Resource Default limit Maximum limit
    Public IP addresses1,2 10 for Basic. Contact support.
    Static Public IP addresses1 10 for Basic. Contact support.
    Standard Public IP addresses1 10 Contact support.
    Public IP prefixes limited by number of Standard Public IPs in a subscription Contact support.
    Public IP prefix length /28 Contact support.
    Custom IP prefixes 5 Contact support.

    1Default limits for Public IP addresses vary by offer category type, such as Free Trial, Pay-As-You-Go, CSP. For example, the default for Enterprise Agreement subscriptions is 1000.

    2Public IP addresses limit refers to the total amount of Public IP addresses, including Basic and Standard.

    Load balancer limits

    The following limits apply only for networking resources managed through Azure Resource Manager per region per subscription. Learn how to view your current resource usage against your subscription limits.

    Standard Load Balancer

    Resource Limit
    Load balancers 1,000
    Frontend IP configurations 600
    Rules (Load Balancer + Inbound NAT) per resource 1,500
    Rules per NIC (across all IPs on a NIC) 300
    High-availability ports rule 1 per internal frontend
    Outbound rules per Load Balancer 600
    Backend pool size 5,000
    Azure global Load Balancer Backend pool size 300
    Backend IP configurations per frontend 1 10,000
    Backend IP configurations across all frontends 500,000

    1 Backend IP configurations are aggregated across all load balancer rules including load balancing, inbound NAT, and outbound rules. Each rule a backend pool instance is configured to counts as one configuration.

    Load Balancer doesn't apply any throughput limits. However, throughput limits for virtual machines and virtual networks still apply. For more information, see Virtual machine network bandwidth.

    Gateway Load Balancer

    Resource Limit
    Resources chained per Load Balancer (LB frontend configurations or VM NIC IP configurations combined) 100

    All limits for Standard Load Balancer also apply to Gateway Load Balancer.

    Basic Load Balancer

    Resource Limit
    Load balancers 1,000
    Rules per resource 250
    Rules per NIC (across all IPs on a NIC) 300
    Frontend IP configurations 3 200
    Backend pool size 300 IP configurations, single availability set
    Availability sets per Load Balancer 1
    Load Balancers per VM 2 (1 Public and 1 internal)

    3 The limit for a single discrete resource in a backend pool (standalone virtual machine, availability set, or virtual machine scale-set placement group) is to have up to 250 Frontend IP configurations across a single Basic Public Load Balancer and Basic Internal Load Balancer.

    The following limits apply only for networking resources managed through the classic deployment model per subscription. Learn how to view your current resource usage against your subscription limits.

    Resource Default limit Maximum limit
    Virtual networks 100 100
    Local network sites 20 50
    DNS servers per virtual network 20 20
    Private IP addresses per virtual network 4,096 4,096
    Concurrent TCP or UDP flows per NIC of a virtual machine or role instance 500,000, up to 1,000,000 for two or more NICs. 500,000, up to 1,000,000 for two or more NICs.
    Network Security Groups (NSGs) 200 200
    NSG rules per NSG 200 1,000
    User-defined route tables 200 200
    User-defined routes per route table 400 400
    Public IP addresses (dynamic) 500 500
    Reserved public IP addresses 500 500
    Public IP per deployment 5 Contact support
    Private IP (internal load balancing) per deployment 1 1
    Endpoint access control lists (ACLs) 50 50

    Application Gateway limits

    The following table applies to v1, v2, Standard, and WAF SKUs unless otherwise stated.

    Resource Limit Note
    Azure Application Gateway 1,000 per region per subscription
    Frontend IP configurations 2 1 public and 1 private
    Frontend ports 1001
    Backend address pools 100
    Backend targets per pool 1,200
    HTTP listeners 2001 Limited to 100 active listeners that are routing traffic. Active listeners = total number of listeners - listeners not active.
    If a default configuration inside a routing rule is set to route traffic (for example, it has a listener, a backend pool, and HTTP settings) then that also counts as a listener. For more information, see Frequently asked questions about Application Gateway.
    HTTP load-balancing rules 4001
    Backend HTTP settings 1001
    Instances per gateway V1 SKU - 32
    V2 SKU - 125
    SSL certificates 1001 1 per HTTP listener
    Maximum SSL certificate size V1 SKU - 10 KB
    V2 SKU - 16 KB
    Maximum trusted client CA certificate size 25 KB 25 KB is the maximum aggregated size of root and intermediate certificates contained in an uploaded pem or cer file.
    Maximum trusted client CA certificates 200 100 per SSL Profile
    Authentication certificates 100
    Trusted root certificates 100
    Request timeout minimum 1 second
    Request timeout maximum to private backend 24 hours
    Request timeout maximum to external backend 4 minutes
    Number of sites 1001 1 per HTTP listener
    URL maps per listener 1
    Host names per listener 5
    Maximum path-based rules per URL map 100
    Redirect configurations 1001
    Number of rewrite rule sets 400
    Number of Header or URL configuration per rewrite rule set 40
    Number of conditions per rewrite rule set 40
    Concurrent WebSocket connections Medium gateways 20k2
    Large gateways 50k2
    Maximum URL length 32 KB
    Maximum header size 32 KB
    Maximum header field size for HTTP/2 8 KB
    Maximum header size for HTTP/2 16 KB
    Maximum file upload size (Standard SKU) V2 - 4 GB
    V1 - 2 GB
    Maximum file upload size (WAF SKU) V1 Medium - 100 MB
    V1 Large - 500 MB
    V2 - 750 MB
    V2 (with CRS 3.2 or newer) - 4 GB3
    WAF body size limit (without files) V1 or V2 (with CRS 3.1 and older) - 128 KB
    V2 (with CRS 3.2 or newer) - 2 MB3
    Maximum Private Link Configurations 2 1 for public IP, 1 for private IP
    Maximum Private Link IP Configurations 8
    Maximum WAF custom rules per WAF policy 100
    WAF IP address ranges per match condition 540
    600 - with CRS 3.2 or newer
    Maximum WAF exclusions per Application Gateway 40
    200 - with CRS 3.2 or newer
    WAF string match values per match condition 10

    1 The number of resources listed in the table applies to standard Application Gateway SKUs and WAF-enabled SKUs running CRS 3.2 or higher. For WAF-enabled SKUs running CRS 3.1 or lower, the supported number is 40. For more information, see WAF engine.

    2 Limit is per Application Gateway instance not per Application Gateway resource.

    3 Must define the value via WAF Policy for Application Gateway.

    Application Gateway for Containers limits

    Resource Limit
    Application Gateway for Containers 1000 per subscription
    Associations 1 per gateway
    Frontends 5 per gateway

    Kubernetes Ingress and Gateway API configuration limits

    Resource Limit
    Resource naming 128 characters
    Namespace naming 128 characters
    Listeners per gateway 64 listeners per gateway resource (enforced by Gateway API)
    Total AGC references 5 per ALB controller
    Total certificate references 100 per AGC
    Total listeners 200 per AGC
    Total routes 200 per AGC
    Total rules 200 per AGC
    Total services 100 per AGC
    Total endpoints 5000 per AGC

    Azure Bastion limits

    An instance is an optimized Azure VM that is created when you configure Azure Bastion. When you configure Azure Bastion using the Basic SKU, 2 instances are created. If you use the Standard SKU, you can specify the number of instances between 2-50.

    Workload Type* Session Limit per Instance**
    Light 25
    Medium 20
    Heavy 2

    *These workload types are defined here: Remote Desktop workloads
    **These limits are based on RDP performance tests for Azure Bastion. The numbers may vary due to other on-going RDP sessions or other on-going SSH sessions.

    Azure DNS limits

    Public DNS zones

    Resource Limit
    Public DNS zones per subscription 250 1
    Record sets per public DNS zone 10,000 1
    Records per record set in public DNS zone 20
    Number of Alias records for a single Azure resource 20

    1If you need to increase these limits, contact Azure Support.

    Private DNS zones

    Resource Limit
    Private DNS zones per subscription 1000
    Record sets per private DNS zone 25000
    Records per record set for private DNS zones 20
    Virtual Network Links per private DNS zone 1000
    Virtual Networks Links per private DNS zones with autoregistration enabled 100
    Number of private DNS zones a virtual network can get linked to with autoregistration enabled 1
    Number of private DNS zones a virtual network can get linked 1000

    Azure-provided DNS resolver

    Resource Limit
    Number of DNS queries a virtual machine can send to Azure DNS resolver, per second 1000 1
    Maximum number of DNS queries queued (pending response) per virtual machine 200 1

    1These limits are applied to every individual virtual machine and not at the virtual network level. DNS queries exceeding these limits are dropped.

    DNS private resolver1

    Resource Limit
    DNS private resolvers per subscription 15
    Inbound endpoints per DNS private resolver 5
    Outbound endpoints per DNS private resolver 5
    Forwarding rules per DNS forwarding ruleset 1000
    Virtual network links per DNS forwarding ruleset 500
    Outbound endpoints per DNS forwarding ruleset 2
    DNS forwarding rulesets per outbound endpoint 2
    Target DNS servers per forwarding rule 6
    QPS per endpoint 10,000

    1Different limits might be enforced by the Azure portal until the portal is updated. Use PowerShell to provision elements up to the most current limits.

    Azure Firewall limits

    Resource Limit
    Max Data throughput 100 Gbps for Premium, 30 Gbps for Standard, 250 Mbps for Basic (preview) SKU

    For more information, see Azure Firewall performance.
    Rule limits 20,000 unique source/destinations in network rules

    Unique source/destinations in network = sum of (unique source addresses * unique destination addresses for each rule)

    An IP group counts as one address, regardless of how many IP addresses it contains.

    You can track the Firewall Policy network rule count in the policy analytics under the Insights tab. As a proxy, you can also monitor your Firewall Latency Probe metrics to ensure it stays within 20 ms even during peak hours.
    Total size of rules within a single Rule Collection Group 1 MB for Firewall policies created before July 2022
    2 MB for Firewall policies created after July 2022
    Number of Rule Collection Groups in a firewall policy 50 for Firewall policies created before July 2022
    90 for Firewall policies created after July 2022
    Maximum DNAT rules (Maximum external destinations) 250 maximum [number of firewall public IP addresses + unique destinations (destination address, port, and protocol)]

    The DNAT limitation is due to the underlying platform.

    For example, you can configure 500 UDP rules to the same destination IP address and port (one unique destination), while 500 rules to the same IP address but to 500 different ports exceeds the limit (500 unique destinations).
    Minimum AzureFirewallSubnet size /26
    Port range in network and application rules 1 - 65535
    Public IP addresses 250 maximum. All public IP addresses can be used in DNAT rules and they all contribute to available SNAT ports.
    IP addresses in IP Groups Maximum of 200 IP Groups per firewall.
    Maximum 5000 individual IP addresses or IP prefixes per each IP Group.
    Route table By default, AzureFirewallSubnet has a 0.0.0.0/0 route with the NextHopType value set to Internet.

    Azure Firewall must have direct Internet connectivity. If your AzureFirewallSubnet learns a default route to your on-premises network via BGP, you must override that with a 0.0.0.0/0 UDR with the NextHopType value set as Internet to maintain direct Internet connectivity. By default, Azure Firewall doesn't support forced tunneling to an on-premises network.

    However, if your configuration requires forced tunneling to an on-premises network, Microsoft will support it on a case by case basis. Contact Support so that we can review your case. If accepted, we'll allow your subscription and ensure the required firewall Internet connectivity is maintained.
    FQDNs in network rules For good performance, do not exceed more than 1000 FQDNs across all network rules per firewall.
    TLS inspection timeout 120 seconds

    Azure Front Door (classic) limits

    Resource Classic tier limit
    Azure Front Door resources per subscription 100
    Front-end hosts, which include custom domains per resource 500
    Routing rules per resource 500
    Rules per Rule set 25
    Back-end pools per resource2 50
    Back ends per back-end pool 100
    Path patterns to match for a routing rule 25
    URLs in a single cache purge call 100
    Maximum bandwidth1 75 Gbps
    Maximum requests per second per profile1 100,000
    HTTP header size limit (per header) 32 KB
    Custom web application firewall rules per policy 100
    Web application firewall policy per subscription 100
    Web application firewall match conditions per custom rule 10
    Web application firewall IP address ranges per custom rule 600
    Web application firewall string match values per match condition 10
    Web application firewall string match value length 256
    Web application firewall POST body parameter name length 256
    Web application firewall HTTP header name length 256
    Web application firewall cookie name length 256
    Web application firewall exclusion limit 100
    Web application firewall HTTP request body size inspected 128 KB
    Web application firewall custom response body length 32 KB

    1If the traffic isn't globally distributed and concentrated in one or more regions, or if a higher quota limited is need, create an Azure support request.

    2To request a limit increase, create an Azure Support request. Free subscriptions including Azure Free Account and Azure for Students aren't eligible for limit or quota increases. If you have a free subscription, you can upgrade to a Pay-As-You-Go subscription.

    Azure Front Door Standard and Premium service limits

    Resource Standard tier limit Premium tier limit
    Maximum profiles per subscription 500 500
    Maximum endpoint per profile 10 25
    Maximum custom domain per profile 100 500
    Maximum origin groups per profile 100 200
    Maximum origins per origin group 50 50
    Maximum origins per profile 100 200
    Maximum origin timeout 16 - 240 secs 16 - 240 secs
    Maximum routes per profile 100 200
    Maximum rule set per profile 100 200
    Maximum rules per route 100 100
    Maximum rules per rule set 100 100
    Maximum bandwidth1 75 Gbps 75 Gbps
    Maximum requests per second per profile1 100,000 100,000
    Path patterns to match for a routing rule 25 50
    URLs in a single cache purge call 100 100
    Maximum security policy per profile 100 200
    Maximum associations per security policy 110 225
    Maximum secrets per profile 100 500
    HTTP header size limit (per header) 32 KB 32 KB
    Web Application Firewall (WAF) policy per subscription 100 100
    WAF custom rules per policy 100 100
    WAF match conditions per custom rule 10 10
    WAF custom regex rules per policy 5 5
    WAF IP address ranges per match conditions 600 600
    WAF string match values per match condition 10 10
    WAF string match value length 256 256
    WAF POST body parameter name length 256 256
    WAF HTTP header name length 256 256
    WAF cookie name length 256 256
    WAF exclusion per policy 100 100
    WAF HTTP request body size inspected 128 KB 128 KB
    WAF custom response body length 32 KB 32 KB

    1If the traffic isn't globally distributed and concentrated in one or more regions, or if a higher quota limited is need, create an Azure support request.

    Timeout values

    From Client to Front Door
    • Front Door has an idle TCP connection timeout of 61 seconds.
    Front Door to application back-end
    • After the HTTP request gets forwarded to the back end, Azure Front Door waits for 60 seconds (Standard and Premium) or 30 seconds (classic) for the first packet from the back end. Then it returns a 503 error to the client, or 504 for a cached request. You can configure this value using the originResponseTimeoutSeconds field in Azure Front Door Standard and Premium API, or the sendRecvTimeoutSeconds field in the Azure Front Door (classic) API.

    • After the back end receives the first packet, if the origin pauses for any reason in the middle of the response body beyond the originResponseTimeoutSeconds or sendRecvTimeoutSeconds, the response will be canceled.

    • Front Door takes advantage of HTTP keep-alive to keep connections open for reuse from previous requests. These connections have an idle timeout of 90 seconds. Azure Front Door would disconnect idle connections after reaching the 90-second idle timeout. This timeout value can't be configured.

    Upload and download data limit

    With chunked transfer encoding (CTE) Without HTTP chunking
    Download There's no limit on the download size. There's no limit on the download size.
    Upload There's no limit as long as each CTE upload is less than 2 GB. The size can't be larger than 2 GB.

    Other limits

    • Maximum URL size - 8,192 bytes - Specifies maximum length of the raw URL (scheme + hostname + port + path + query string of the URL)
    • Maximum Query String size - 4,096 bytes - Specifies the maximum length of the query string, in bytes.
    • Maximum HTTP response header size from health probe URL - 4,096 bytes - Specified the maximum length of all the response headers of health probes.
    • Maximum rules engine action header value character: 640 characters.
    • Maximum rules engine condition header value character: 256 characters.
    • Maximum ETag header size: 128 bytes
    • Maximum endpoint name for Standard and Premium: 46 characters.

    For more information about limits that apply to Rules Engine configurations, see rules engine terminology

    Azure Network Watcher limits

    Resource Limit
    Network Watcher instances per region per subscription 1 (One instance in a region to enable access to the service in the region)
    Connection monitors per region per subscription 100
    Maximum test groups per a connection monitor 20
    Maximum sources and destinations per a connection monitor 100
    Maximum test configurations per a connection monitor 20
    Packet capture sessions per region per subscription 10,000 (Number of sessions only, not saved captures)
    VPN troubleshoot operations per subscription 1 (Number of operations at one time)

    Azure Route Server limits

    Resource Limit
    Number of BGP peers 8
    Number of routes each BGP peer can advertise to Azure Route Server 1 1,000
    Number of VMs in the virtual network (including peered virtual networks) that Azure Route Server can support 2 4,000
    Number of virtual networks that Azure Route Server can support 250
    Number of virtual network prefixes that Azure Route Server can support 400

    1 If your NVA advertises more routes than the limit, the BGP session gets dropped.

    2 The number of VMs that Azure Route Server can support isn’t a hard limit and it depends on the availability and performance of the underlying infrastructure.

    Note

    The total number of routes advertised from VNet address space and Route Server towards ExpressRoute circuit, when Branch-to-branch enabled, must not exceed 1,000. For more information, see Route advertisement limits of ExpressRoute.

    ExpressRoute limits

    Resource Limit
    ExpressRoute circuits per subscription 50 (Submit a support request to increase limit)
    ExpressRoute circuits per region per subscription, with Azure Resource Manager 10
    Maximum number of circuits in the same peering location linked to the same virtual network 4
    Maximum number of circuits in different peering locations linked to the same virtual network Standard / ERGw1Az - 4
    High Perf / ERGw2Az - 8
    Ultra Performance / ErGw3Az - 16
    Maximum number of IPs for ExpressRoute provider circuit with Fastpath 25,000
    Maximum number of IPs for ExpressRoute Direct 10 Gbps with Fastpath 100,000
    Maximum number of IPs for ExpressRoute Direct 100 Gbps with Fastpath 200,000
    Maximum number of flows for ExpressRoute Traffic Collector 300,000

    Route advertisement limits

    Resource Local / Standard SKU Premium SKU
    Maximum number of IPv4 routes advertised to Azure private peering from on-premises 4,000 10,000
    Maximum number of IPv6 routes advertised to Azure private peering from on-premises 100 100
    Maximum number of IPv4 routes advertised from Azure private peering from the VNet address space to ExpressRoute virtual network gateway 1,000 1,000
    Maximum number of IPv6 routes advertised from Azure private peering from the VNet address space to ExpressRoute virtual network gateway 100 100
    Maximum number of IPv4 routes advertised to Microsoft peering from on-premises 200 200
    Maximum number of IPv6 routes advertised to Microsoft peering from on-premises 200 200
    Circuit size Local / Standard SKU Premium SKU
    50 Mbps 10 20
    100 Mbps 10 25
    200 Mbps 10 25
    500 Mbps 10 40
    1 Gbps 10 50
    2 Gbps 10 60
    5 Gbps 10 75
    10 Gbps 10 100
    40 Gbps* 10 100
    100 Gbps* 10 100

    *100-Gbps ExpressRoute Direct Only

    Note

    Global Reach connections count against the limit of virtual network connections per ExpressRoute Circuit. For example, a 10 Gbps Premium Circuit would allow for 5 Global Reach connections and 95 connections to the ExpressRoute Gateways or 95 Global Reach connections and 5 connections to the ExpressRoute Gateways or any other combination up to the limit of 100 connections for the circuit.

    ExpressRoute gateway performance limits

    The following tables provides an overview of the different types of gateways, their respective limitations, and their expected performance metrics. These numbers are derived from the following testing conditions and represent the max support limits. Actual performance may vary, depending on how closely traffic replicates these testing conditions.

    Testing conditions

    Gateway SKU Traffic sent from on-premises Number of routes advertised by gateway Number of routes learned by gateway
    Standard/ERGw1Az 1 Gbps 500 4000
    High Performance/ERGw2Az 2 Gbps 500 9,500
    Ultra Performance/ErGw3Az 10 Gbps 500 9,500
    ErGwScale (per scale unit) 1 Gbps 500 4,000

    Note

    ExpressRoute can facilitate up to 11,000 routes that spans virtual network address spaces, on-premises network, and any relevant virtual network peering connections. To ensure stability of your ExpressRoute connection, refrain from advertising more than 11,000 routes to ExpressRoute.

    Performance results

    This table applies to both the Azure Resource Manager and classic deployment models.

    Gateway SKU Connections per second Mega-Bits per second Packets per second Supported number of VMs in the virtual network 1 Flow count limit
    Standard/ERGw1Az 7,000 1,000 100,000 2,000 100,000
    High Performance/ERGw2Az 14,000 2,000 200,000 4,500 200,000
    Ultra Performance/ErGw3Az 16,000 10,000 1,000,000 11,000 1,000,000
    ErGwScale (per scale unit) N/A 1,000 100,000 2,000 100,000 per scale unit

    1 The values in the table are estimates and varies depending on the CPU utilization of the gateway. If the CPU utilization is high and the number of supported VMs gets exceeded, the gateway will start to dropping packets.

    Important

    • Application performance depends on multiple factors, such as end-to-end latency, and the number of traffic flows the application opens. The numbers in the table represent the upper limit that the application can theoretically achieve in an ideal environment. Additionally, Microsoft performs routine host and OS maintenance on the ExpressRoute Virtual Network Gateway, to maintain reliability of the service. During a maintenance period, the control plane and data path capacity of the gateway is reduced.
    • During a maintenance period, you may experience intermittent connectivity issues to private endpoint resources.
    • ExpressRoute supports a maximum TCP and UDP packet size of 1400 bytes. Packet size larger than 1400 bytes will get fragmented.
    • Azure Route Server can support up to 4000 VMs. This limit includes VMs in virtual networks that are peered. For more information, see Azure Route Server limitations.

    NAT Gateway limits

    The following limits apply to NAT gateway resources managed through Azure Resource Manager per region per subscription. Learn how to view your current resource usage against your subscription limits.

    Resource Limit
    Public IP addresses 16 per NAT gateway
    Subnets 800 per NAT gateway
    Data throughput 50 Gbps
    NAT gateways 1,000 per subscription per region
    Packets processed 1M - 5M packets per second
    Connections to same destination endpoint 50,000 connections to the same destination per public IP
    Connections total 2M connections per NAT gateway

    The following limits apply to Azure private link:

    Resource Limit
    Number of private endpoints per virtual network 1000
    Number of private endpoints per subscription      64000
    Number of private link services per subscription       800
    Number of private link services per Standard Load Balancer       8
    Number of IP Configurations on a private link service    8 (This number is for the NAT IP addresses used per PLS)
    Number of private endpoints on the same private link service  1000
    Number of subscriptions allowed in visibility setting on private link service  100
    Number of subscriptions allowed in auto-approval setting on private link service  100
    Number of private endpoints per key vault 64
    Number of key vaults with private endpoints per subscription 400
    Number of private DNS zone groups that can be linked to a private endpoint 1
    Number of DNS zones in each group 5
    Number of private IP addresses on private endpoint network interface    500

    Traffic Manager limits

    Resource Limit
    Profiles per subscription 200 1
    Endpoints per profile 200

    1If you need to increase these limits, contact Azure Support.

    VPN Gateway limits

    The following limits apply to VPN Gateway resources and VPN Gateway virtual network gateways, unless otherwise stated.

    Resource Limit
    VNet Address Prefixes 600 per VPN gateway
    Aggregate BGP routes 4,000 per VPN gateway
    Local Network Gateway address prefixes 1000 per local network gateway
    S2S connections Limit depends on the gateway SKU. See the Limits by gateway SKU table.
    P2S connections Limit depends on the gateway SKU. See the Limits by gateway SKU table.
    P2S route limit - IKEv2 256 for non-Windows / 25 for Windows
    P2S route limit - OpenVPN 1000
    Max. flows 100K for VpnGw1/AZ / 512K for VpnGw2-4/AZ
    Traffic Selector Policies 100
    Custom APIPA BGP addresses 32
    Supported number of VMs in the virtual network Limit depends on the gateway SKU. See the Limits by gateway SKU table.

    Limits by gateway SKU

    VPN
    Gateway
    Generation
    SKU S2S/VNet-to-VNet
    Tunnels
    P2S
    SSTP Connections
    P2S
    IKEv2/OpenVPN Connections
    Aggregate
    Throughput Benchmark
    BGP Zone-redundant Supported Number of VMs in the Virtual Network
    Generation1 Basic Max. 10 Max. 128 Not Supported 100 Mbps Not Supported No 200
    Generation1 VpnGw1 Max. 30 Max. 128 Max. 250 650 Mbps Supported No 450
    Generation1 VpnGw2 Max. 30 Max. 128 Max. 500 1 Gbps Supported No 1300
    Generation1 VpnGw3 Max. 30 Max. 128 Max. 1000 1.25 Gbps Supported No 4000
    Generation1 VpnGw1AZ Max. 30 Max. 128 Max. 250 650 Mbps Supported Yes 1000
    Generation1 VpnGw2AZ Max. 30 Max. 128 Max. 500 1 Gbps Supported Yes 2000
    Generation1 VpnGw3AZ Max. 30 Max. 128 Max. 1000 1.25 Gbps Supported Yes 5000
    Generation2 VpnGw2 Max. 30 Max. 128 Max. 500 1.25 Gbps Supported No 685
    Generation2 VpnGw3 Max. 30 Max. 128 Max. 1000 2.5 Gbps Supported No 2240
    Generation2 VpnGw4 Max. 100* Max. 128 Max. 5000 5 Gbps Supported No 5300
    Generation2 VpnGw5 Max. 100* Max. 128 Max. 10000 10 Gbps Supported No 6700
    Generation2 VpnGw2AZ Max. 30 Max. 128 Max. 500 1.25 Gbps Supported Yes 2000
    Generation2 VpnGw3AZ Max. 30 Max. 128 Max. 1000 2.5 Gbps Supported Yes 3300
    Generation2 VpnGw4AZ Max. 100* Max. 128 Max. 5000 5 Gbps Supported Yes 4400
    Generation2 VpnGw5AZ Max. 100* Max. 128 Max. 10000 10 Gbps Supported Yes 9000

    For more information about gateway SKUs and limits, see About gateway SKUs.

    Gateway performance limits

    The table in this section lists the results of performance tests for VpnGw SKUs. A VPN tunnel connects to a VPN gateway instance. Each instance throughput is mentioned in the throughput table in the previous section and is available aggregated across all tunnels connecting to that instance. The table shows the observed bandwidth and packets per second throughput per tunnel for the different gateway SKUs. All testing was performed between gateways (endpoints) within Azure across different regions with 100 connections and under standard load conditions. We used publicly available iPerf and CTSTraffic tools to measure performances for site-to-site connections

    • The best performance was obtained when we used the GCMAES256 algorithm for both IPsec Encryption and Integrity.
    • Average performance was obtained when using AES256 for IPsec Encryption and SHA256 for Integrity.
    • The lowest performance was obtained when we used DES3 for IPsec Encryption and SHA256 for Integrity.
    Generation SKU Algorithms
    used
    Throughput
    observed per tunnel
    Packets per second per tunnel
    observed
    Generation1 VpnGw1 GCMAES256
    AES256 & SHA256
    DES3 & SHA256
    650 Mbps
    500 Mbps
    130 Mbps
    62,000
    47,000
    12,000
    Generation1 VpnGw2 GCMAES256
    AES256 & SHA256
    DES3 & SHA256
    1.2 Gbps
    650 Mbps
    140 Mbps
    100,000
    61,000
    13,000
    Generation1 VpnGw3 GCMAES256
    AES256 & SHA256
    DES3 & SHA256
    1.25 Gbps
    700 Mbps
    140 Mbps
    120,000
    66,000
    13,000
    Generation1 VpnGw1AZ GCMAES256
    AES256 & SHA256
    DES3 & SHA256
    650 Mbps
    500 Mbps
    130 Mbps
    62,000
    47,000
    12,000
    Generation1 VpnGw2AZ GCMAES256
    AES256 & SHA256
    DES3 & SHA256
    1.2 Gbps
    650 Mbps
    140 Mbps
    110,000
    61,000
    13,000
    Generation1 VpnGw3AZ GCMAES256
    AES256 & SHA256
    DES3 & SHA256
    1.25 Gbps
    700 Mbps
    140 Mbps
    120,000
    66,000
    13,000
    Generation2 VpnGw2 GCMAES256
    AES256 & SHA256
    DES3 & SHA256
    1.25 Gbps
    550 Mbps
    130 Mbps
    120,000
    52,000
    12,000
    Generation2 VpnGw3 GCMAES256
    AES256 & SHA256
    DES3 & SHA256
    1.5 Gbps
    700 Mbps
    140 Mbps
    140,000
    66,000
    13,000
    Generation2 VpnGw4 GCMAES256
    AES256 & SHA256
    DES3 & SHA256
    2.3 Gbps
    700 Mbps
    140 Mbps
    220,000
    66,000
    13,000
    Generation2 VpnGw5 GCMAES256
    AES256 & SHA256
    DES3 & SHA256
    2.3 Gbps
    700 Mbps
    140 Mbps
    220,000
    66,000
    13,000
    Generation2 VpnGw2AZ GCMAES256
    AES256 & SHA256
    DES3 & SHA256
    1.25 Gbps
    550 Mbps
    130 Mbps
    120,000
    52,000
    12,000
    Generation2 VpnGw3AZ GCMAES256
    AES256 & SHA256
    DES3 & SHA256
    1.5 Gbps
    700 Mbps
    140 Mbps
    140,000
    66,000
    13,000
    Generation2 VpnGw4AZ GCMAES256
    AES256 & SHA256
    DES3 & SHA256
    2.3 Gbps
    700 Mbps
    140 Mbps
    220,000
    66,000
    13,000
    Generation2 VpnGw5AZ GCMAES256
    AES256 & SHA256
    DES3 & SHA256
    2.3 Gbps
    700 Mbps
    140 Mbps
    220,000
    66,000
    13,000

    Virtual WAN limits

    Resource Limit
    VPN (branch) connections per hub 1,000
    Aggregate throughput per Virtual WAN Site-to-site VPN gateway 20 Gbps
    Throughput per Virtual WAN VPN connection (2 tunnels) 2 Gbps with 1 Gbps/IPsec tunnel
    Point-to-site users per hub 100,000
    Aggregate throughput per Virtual WAN User VPN (Point-to-site) gateway 200 Gbps
    Aggregate throughput per Virtual WAN ExpressRoute gateway 20 Gbps
    ExpressRoute circuit connections per hub 8
    VNet connections per hub 500 minus total number of hubs in Virtual WAN
    Aggregate throughput per Virtual WAN hub router 50 Gbps for VNet to VNet transit
    VM workload across all VNets connected to a single Virtual WAN hub 2000 (If you want to raise the limit or quota above the default limit, see hub settings).
    Total number of routes the hub can accept from its connected resources (virtual networks, branches, other virtual hubs, etc.) 10,000

    Notification Hubs limits

    Tier Free Basic Standard
    Included pushes 1 million 10 million 10 million
    Active devices 500 200,000 10 million
    Tag quota per installation or registration 60 60 60

    For more information on limits and pricing, see Notification Hubs pricing.

    Microsoft Dev Box limits

    Subscription type VM Cores Network Connections Dev centers Dev box definitions Dev box projects
    Pay as you go 20 5 2 200 500
    Azure Pass 20 5 2 200 500
    CSP 20 5 2 200 500
    Free trial 0 0 0 0 0
    Azure for Students 0 0 0 0 0
    Enterprise 80 10 5 200 500
    MSDN n/a 5 2 200 500

    Microsoft Purview limits

    The latest values for Microsoft Purview quotas can be found in the Microsoft Purview quota page.

    Microsoft Sentinel limits

    For Microsoft Sentinel limits, see Service limits for Microsoft Sentinel

    Service Bus limits

    The following table lists quota information specific to Azure Service Bus messaging. For information about pricing and other quotas for Service Bus, see Service Bus pricing.

    Quota name Scope Value Notes
    Maximum number of namespaces per Azure subscription Namespace 1000 (default and maximum) This limit is based on the Microsoft.ServiceBus provider, not based on the tier. Therefore, it's the total number of namespaces across all tiers. Subsequent requests for additional namespaces are rejected.
    Queue or topic size Entity

    1, 2, 3, 4 GB or 5 GB

    In the Premium SKU, and the Standard SKU with partitioning enabled, the maximum queue or topic size is 80 GB.

    Total size limit for a premium namespace per messaging unit is 1 TB. Total size of all entities in a namespace can't exceed this limit.

    Defined upon creation/updation of the queue or topic.

    Subsequent incoming messages are rejected, and an exception is received by the calling code.

    Currently, a large message (size > 1 MB) sent to a queue is counted twice. And, a large message (size > 1 MB) sent to a topic is counted X + 1 times, where X is the number of subscriptions to the topic.

    Number of concurrent connections on a namespace Namespace Net Messaging: 1,000.

    AMQP: 5,000.
    Subsequent requests for additional connections are rejected, and an exception is received by the calling code. REST operations don't count toward concurrent TCP connections.
    Number of concurrent receive requests on a queue, topic, or subscription entity Entity 5,000 Subsequent receive requests are rejected, and an exception is received by the calling code. This quota applies to the combined number of concurrent receive operations across all subscriptions on a topic.
    Number of topics or queues per namespace Namespace 10,000 for the Basic or Standard tier. The total number of topics and queues in a namespace must be less than or equal to 10,000.

    For the Premium tier, 1,000 per messaging unit (MU).
    Subsequent requests for creation of a new topic or queue on the namespace are rejected. As a result, if configured through the Azure portal, an error message is generated. If called from the management API, an exception is received by the calling code.
    Number of partitioned topics or queues per namespace Namespace Basic and Standard tiers: 100. Each partitioned queue or topic counts toward the quota of 1,000 entities per namespace. Subsequent requests for creation of a new partitioned topic or queue in the namespace are rejected. As a result, if configured through the Azure portal, an error message is generated. If called from the management API, the exception QuotaExceededException is received by the calling code.

    If you want to have more partitioned entities in a basic or a standard tier namespace, create additional namespaces.

    Maximum size of any messaging entity path: queue or topic Entity 260 characters.  
    Maximum size of any messaging entity name: namespace, subscription, or subscription rule Entity 50 characters.  
    Maximum size of a message ID Entity 128  
    Maximum size of a message session ID Entity 128  
    Message size for a queue, topic, or subscription entity Entity 256 KB for Standard tier
    100 MB for Premium tier on AMQP, and 1 MB for Premium on HTTP and SBMP.

    The maximum size for batches is 256 KB for the Standard tier, 100 MB for Premium on AMQP, and 1 MB for Premium on HTTP and SBMP.

    The message size includes the size of properties (system and user) and the size of payload. The size of system properties varies depending on your scenario.
    Incoming messages that exceed these quotas are rejected, and an exception is received by the calling code.
    Message property size for a queue, topic, or subscription entity Entity

    Maximum message property size for each property is 32 KB.

    Cumulative size of all properties can't exceed 64 KB. This limit applies to the entire header of the brokered message, which has both user properties and system properties, such as sequence number, label, and message ID.

    Maximum number of header properties in property bag: byte/int.MaxValue.

    The exception SerializationException is generated.
    Number of subscriptions per topic Entity 2,000 per-topic for the Standard tier and Premium tier. Subsequent requests for creating additional subscriptions for the topic are rejected. As a result, if configured through the portal, an error message is shown. If called from the management API, an exception is received by the calling code.
    Number of SQL filters per topic Entity 2,000 Subsequent requests for creation of additional filters on the topic are rejected, and an exception is received by the calling code.
    Number of correlation filters per topic Entity 100,000 Subsequent requests for creation of additional filters on the topic are rejected, and an exception is received by the calling code.
    Size of SQL filters or actions Namespace Maximum length of filter condition string: 1,024 (1 K).

    Maximum length of rule action string: 1,024 (1 K).

    Maximum number of expressions per rule action: 32.
    Subsequent requests for creation of additional filters are rejected, and an exception is received by the calling code.
    Number of shared access authorization rules per namespace, queue, or topic Entity, namespace Maximum number of rules per entity type: 12.

    Rules that are configured on a Service Bus namespace apply to all types: queues, topics.
    Subsequent requests for creation of additional rules are rejected, and an exception is received by the calling code.
    Number of messages per transaction Transaction 100

    For both Send() and SendAsync() operations.
    Additional incoming messages are rejected, and an exception stating "Can't send more than 100 messages in a single transaction" is received by the calling code.
    Number of virtual network and IP filter rules Namespace 128  

    Site Recovery limits

    The following limits apply to Azure Site Recovery.

    Limit identifier Limit
    Number of vaults per subscription 500
    Number of protected disks per subscription (Both Data and OS) 3000
    Number of appliances per Recovery Services vault 250
    Number of protection groups per Recovery Services vault No limit
    Number of recovery plans per Recovery Services vault No limit
    Number of servers per protection group No limit
    Number of servers per recovery plan 100

    SQL Database limits

    For SQL Database limits, see SQL Database resource limits for single databases, SQL Database resource limits for elastic pools and pooled databases, and SQL Database resource limits for SQL Managed Instance.

    The maximum number of private endpoints per Azure SQL Database logical server is 250.

    Azure Synapse Analytics limits

    Azure Synapse Analytics has the following default limits to ensure customer's subscriptions are protected from each other's workloads. To raise the limits to the maximum for your subscription, contact support.

    Azure Synapse limits for workspaces

    For Pay-As-You-Go, Free Trial, Azure Pass, and Azure for Students subscription offer types:

    Resource Default limit Maximum limit
    Synapse workspaces in an Azure subscription 2 2

    For other subscription offer types:

    Resource Default limit Maximum limit
    Synapse workspaces in an Azure subscription per region 20 100

    Azure Synapse limits for Apache Spark

    For Pay-As-You-Go, Free Trial, Azure Pass, and Azure for Students subscription offer types:

    Resource Memory Optimized cores GPU cores
    Spark cores in a Synapse workspace 12 48

    For other subscription offer types:

    Resource Memory Optimized cores GPU cores
    Spark cores in a Synapse workspace 50 50

    For additional limits for Spark pools, see Concurrency and API rate limits for Apache Spark pools in Azure Synapse Analytics.

    Azure Synapse limits for pipelines

    Resource Default limit Maximum limit
    Synapse pipelines in a Synapse workspace 800 800
    Total number of entities, such as pipelines, data sets, triggers, linked services, Private Endpoints, and integration runtimes, within a workspace 5,000 Find out how to request a quota increase from support.
    Total CPU cores for Azure-SSIS Integration Runtimes under one workspace 256 Find out how to request a quota increase from support.
    Concurrent pipeline runs per workspace that's shared among all pipelines in the workspace 10,000 10,000
    Concurrent External activity runs per workspace per Azure Integration Runtime region
    External activities are managed on integration runtime but execute on linked services, including Databricks, stored procedure, HDInsight, Web, and others. This limit does not apply to Self-hosted IR.
    3,000 3,000
    Concurrent Pipeline activity runs per workspace per Azure Integration Runtime region
    Pipeline activities execute on integration runtime, including Lookup, GetMetadata, and Delete. This limit does not apply to Self-hosted IR.
    1,000 1,000
    Concurrent authoring operations per workspace per Azure Integration Runtime region
    Including test connection, browse folder list and table list, preview data. This limit does not apply to Self-hosted IR.
    200 200
    Concurrent Data Integration Units1 consumption per workspace per Azure Integration Runtime region Region group 12: 6,000
    Region group 22: 3,000
    Region group 32: 1,500
    Managed virtual network2: 2,400
    Region group 12: 6,000
    Region group 22: 3,000
    Region group 32: 1,500
    Managed virtual network: Find out how to request a quota increase from support.
    Maximum activities per pipeline, which includes inner activities for containers 40 40
    Maximum number of linked integration runtimes that can be created against a single self-hosted integration runtime 100 Find out how to request a quota increase from support.
    Maximum parameters per pipeline 50 50
    ForEach items 100,000 100,000
    ForEach parallelism 20 50
    Maximum queued runs per pipeline 100 100
    Characters per expression 8,192 8,192
    Minimum tumbling window trigger interval 5 min 15 min
    Maximum timeout for pipeline activity runs 7 days 7 days
    Bytes per object for pipeline objects3 200 KB 200 KB
    Bytes per object for dataset and linked service objects3 100 KB 2,000 KB
    Bytes per payload for each activity run4 896 KB 896 KB
    Data Integration Units1 per copy activity run 256 256
    Write API calls 1,200/h 1,200/h

    This limit is imposed by Azure Resource Manager, not Azure Synapse Analytics.
    Read API calls 12,500/h 12,500/h

    This limit is imposed by Azure Resource Manager, not Azure Synapse Analytics.
    Monitoring queries per minute 1,000 1,000
    Maximum time of data flow debug session 8 hrs 8 hrs
    Concurrent number of data flows per integration runtime 50 Find out how to request a quota increase from support.
    Concurrent number of data flows per integration runtime in managed vNet 20 Find out how to request a quota increase from support.
    Concurrent number of data flow debug sessions per user per workspace 3 3
    Data Flow Azure IR TTL limit 4 hrs 4 hrs
    Meta Data Entity Size limit in a workspace 2 GB Find out how to request a quota increase from support.

    1 The data integration unit (DIU) is used in a cloud-to-cloud copy operation, learn more from Data integration units (version 2). For information on billing, see Azure Synapse Analytics Pricing.

    2 Azure Integration Runtime is globally available to ensure data compliance, efficiency, and reduced network egress costs.

    Region group Regions
    Region group 1 Central US, East US, East US 2, North Europe, West Europe, West US, West US 2
    Region group 2 Australia East, Australia Southeast, Brazil South, Central India, Japan East, North Central US, South Central US, Southeast Asia, West Central US
    Region group 3 Other regions

    If managed virtual network is enabled, the data integration unit (DIU) in all region groups are 2,400.

    3 Pipeline, data set, and linked service objects represent a logical grouping of your workload. Limits for these objects don't relate to the amount of data you can move and process with Azure Synapse Analytics. Synapse Analytics is designed to scale to handle petabytes of data.

    4 The payload for each activity run includes the activity configuration, the associated dataset(s) and linked service(s) configurations if any, and a small portion of system properties generated per activity type. Limit for this payload size doesn't relate to the amount of data you can move and process with Azure Synapse Analytics. Learn about the symptoms and recommendation if you hit this limit.

    Azure Synapse limits for dedicated SQL pools

    For details of capacity limits for dedicated SQL pools in Azure Synapse Analytics, see dedicated SQL pool resource limits.

    Azure Resource Manager limits for web service calls

    Azure Resource Manager has limits for API calls. You can make API calls at a rate within the Azure Resource Manager API limits.

    Virtual machine disk limits

    You can attach a number of data disks to an Azure virtual machine (VM). Based on the scalability and performance targets for a VM's data disks, you can determine the number and type of disk that you need to meet your performance and capacity requirements.

    Important

    For optimal performance, limit the number of highly utilized disks attached to the virtual machine to avoid possible throttling. If all attached disks aren't highly utilized at the same time, the virtual machine can support a larger number of disks. Additionally, when creating a managed disk from an existing managed disk, only 49 disks can be created concurrently. More disks can be created after some of the initial 49 have been created.

    For Azure managed disks:

    The following table illustrates the default and maximum limits of the number of resources per region per subscription. The limits remain the same irrespective of disks encrypted with either platform-managed keys or customer-managed keys. There is no limit for the number of Managed Disks, snapshots and images per resource group.

    Resource Limit
    Standard managed disks 50,000
    Standard SSD managed disks 50,000
    Premium SSD managed disks 50,000
    Premium SSD v2 managed disks 1,000
    Premium SSD v2 managed disks capacity2 32,768
    Ultra disks 1,000
    Ultra disk capacity2 32,768
    Standard_LRS snapshots1 75,000
    Standard_ZRS snapshots1 75,000
    Managed image 50,000

    1An individual disk can have 500 incremental snapshots.

    2This is the default max but higher capacities are supported by request. To request an increase in capacity, request a quota increase or contact Azure Support.

    For standard storage accounts:

    A Standard storage account has a maximum total request rate of 20,000 IOPS. The total IOPS across all of your virtual machine disks in a Standard storage account should not exceed this limit.

    For unmanaged disks, you can roughly calculate the number of highly utilized disks supported by a single standard storage account based on the request rate limit. For example, for a Basic tier VM, the maximum number of highly utilized disks is about 66, which is 20,000/300 IOPS per disk. The maximum number of highly utilized disks for a Standard tier VM is about 40, which is 20,000/500 IOPS per disk.

    For premium storage accounts:

    A premium storage account has a maximum total throughput rate of 50 Gbps. The total throughput across all of your VM disks should not exceed this limit.

    For more information, see Virtual machine sizes.

    For VM Applications

    When working with VM applications in Azure, you may encounter an error message that says "Operation could not be completed as it results in exceeding approved UnmanagedStorageAccountCount quota." This error occurs when you have reached the limit for the number of unmanaged storage accounts that you can use.

    When you publish a VM application, Azure needs to replicate it across multiple regions. To do this, Azure creates an unmanaged storage account for each region. The number of unmanaged storage accounts that an application uses is determined by the number of replicas across all applications.

    As a general rule, each storage account can accommodate up to 200 simultaneous connections. Below are options for resolving the "UnmanagedStorageAccountCount" error:

    • Use page blobs for your source application blobs. Unmanaged accounts are only used for block blob replication. Page blobs have no such limits.
    • Reduce the number of replicas for your VM Application versions or delete applications you no longer need.
    • File a support request to obtain a quota increase.

    For more information, see VM Applications.

    Disk encryption sets

    There's a limitation of 1000 disk encryption sets per region, per subscription. For more information, see the encryption documentation for Linux or Windows virtual machines. If you need to increase the quota, contact Azure support.

    Managed virtual machine disks

    Standard HDD managed disks

    Standard Disk Type S4 S6 S10 S15 S20 S30 S40 S50 S60 S70 S80
    Disk size in GiB 32 64 128 256 512 1,024 2,048 4,096 8,192 16,384 32,767
    Base IOPS per disk Up to 500 Up to 500 Up to 500 Up to 500 Up to 500 Up to 500 Up to 500 Up to 500 Up to 1,300 Up to 2,000 Up to 2,000
    *Expanded IOPS per disk N/A N/A N/A N/A N/A Up to 1,500 Up to 3,000 Up to 3,000 Up to 3,000 Up to 3,000 Up to 3,000
    Base throughput per disk Up to 60 MB/s Up to 60 MB/s Up to 60 MB/s Up to 60 MB/s Up to 60 MB/s Up to 60 MB/s Up to 60 MB/s Up to 60 MB/s Up to 300 MB/s Up to 500 MB/s Up to 500 MB/s
    *Expanded throughput per disk N/A N/A N/A N/A N/A Up to 150 MB/s Up to 300 MB/s Up to 500 MB/s Up to 500 MB/s Up to 500 MB/s Up to 500 MB/s

    * Only applies to disks with performance plus (preview) enabled.

    Standard SSD managed disks

    Standard SSD sizes E1 E2 E3 E4 E6 E10 E15 E20 E30 E40 E50 E60 E70 E80
    Disk size in GiB 4 8 16 32 64 128 256 512 1,024 2,048 4,096 8,192 16,384 32,767
    Base IOPS per disk Up to 500 Up to 500 Up to 500 Up to 500 Up to 500 Up to 500 Up to 500 Up to 500 Up to 500 Up to 500 Up to 500 Up to 2,000 Up to 4,000 Up to 6,000
    *Expanded IOPS per disk N/A N/A N/A N/A N/A N/A N/A N/A Up to 1,500 Up to 3,000 Up to 6,000 Up to 6,000 Up to 6,000 Up to 6,000
    Base throughput per disk Up to 60 MB/s Up to 60 MB/s Up to 60 MB/s Up to 60 MB/s Up to 60 MB/s Up to 60 MB/s Up to 60 MB/s Up to 60 MB/s Up to 60 MB/s Up to 60 MB/s Up to 60 MB/s Up to 400 MB/s Up to 600 MB/s Up to 750 MB/s
    *Expanded throughput per disk N/A N/A N/A N/A N/A N/A N/A N/A Up to 150 MB/s Up to 300 MB/s Up to 600 MB/s Up to 750 MB/s Up to 750 MB/s Up to 750 MB/s
    Max burst IOPS per disk 600 600 600 600 600 600 600 600 1000
    Max burst throughput per disk 150 MB/s 150 MB/s 150 MB/s 150 MB/s 150 MB/s 150 MB/s 150 MB/s 150 MB/s 250 MB/s
    Max burst duration 30 min 30 min 30 min 30 min 30 min 30 min 30 min 30 min 30 min

    * Only applies to disks with performance plus (preview) enabled.

    Premium SSD managed disks: Per-disk limits

    Premium SSD sizes  P1 P2 P3 P4 P6 P10 P15 P20 P30 P40 P50 P60 P70 P80
    Disk size in GiB 4 8 16 32 64 128 256 512 1,024 2,048 4,096 8,192 16,384 32,767
    Base provisioned IOPS per disk 120 120 120 120 240 500 1,100 2,300 5,000 7,500 7,500 16,000 18,000 20,000
    **Expanded provisioned IOPS per disk N/A N/A N/A N/A N/A N/A N/A N/A 8,000 16,000 20,000 20,000 20,000 20,000
    Base provisioned Throughput per disk 25 MB/s 25 MB/s 25 MB/s 25 MB/s 50 MB/s 100 MB/s 125 MB/s 150 MB/s 200 MB/s 250 MB/s 250 MB/s 500 MB/s 750 MB/s 900 MB/s
    **Expanded provisioned throughput per disk N/A N/A N/A N/A N/A N/A N/A N/A 300 MB/s 600 MB/s 900 MB/s 900 MB/s 900 MB/s 900 MB/s
    Max burst IOPS per disk 3,500 3,500 3,500 3,500 3,500 3,500 3,500 3,500 30,000* 30,000* 30,000* 30,000* 30,000* 30,000*
    Max burst throughput per disk 170 MB/s 170 MB/s 170 MB/s 170 MB/s 170 MB/s 170 MB/s 170 MB/s 170 MB/s 1,000 MB/s* 1,000 MB/s* 1,000 MB/s* 1,000 MB/s* 1,000 MB/s* 1,000 MB/s*
    Max burst duration 30 min 30 min 30 min 30 min 30 min 30 min 30 min 30 min Unlimited* Unlimited* Unlimited* Unlimited* Unlimited* Unlimited*
    Eligible for reservation No No No No No No No No Yes, up to one year Yes, up to one year Yes, up to one year Yes, up to one year Yes, up to one year Yes, up to one year

    *Applies only to disks with on-demand bursting enabled.
    ** Only applies to disks with performance plus (preview) enabled.

    Premium SSD managed disks: Per-VM limits

    Resource Limit
    Maximum IOPS Per VM 80,000 IOPS with GS5 VM
    Maximum throughput per VM 2,000 MB/s with GS5 VM

    Unmanaged virtual machine disks

    Standard unmanaged virtual machine disks: Per-disk limits

    VM tier Basic tier VM Standard tier VM
    Disk size 4,095 GB 4,095 GB
    Maximum 8-KB IOPS per persistent disk 300 500
    Maximum number of disks that perform the maximum IOPS 66 40

    Premium unmanaged virtual machine disks: Per-account limits

    Resource Limit
    Total disk capacity per account 35 TB
    Total snapshot capacity per account 10 TB
    Maximum bandwidth per account (ingress + egress)1 <=50 Gbps

    1Ingress refers to all data from requests that are sent to a storage account. Egress refers to all data from responses that are received from a storage account.

    Premium unmanaged virtual machine disks: Per-disk limits

    Premium storage disk type P10 P20 P30 P40 P50
    Disk size 128 GiB 512 GiB 1,024 GiB (1 TB) 2,048 GiB (2 TB) 4,095 GiB (4 TB)
    Maximum IOPS per disk 500 2,300 5,000 7,500 7,500
    Maximum throughput per disk 100 MB/sec 150 MB/sec 200 MB/sec 250 MB/sec 250 MB/sec
    Maximum number of disks per storage account 280 70 35 17 8

    Premium unmanaged virtual machine disks: Per-VM limits

    Resource Limit
    Maximum IOPS per VM 80,000 IOPS with GS5 VM
    Maximum throughput per VM 2,000 MB/sec with GS5 VM

    StorSimple System limits

    Limit identifier Limit Comments
    Maximum number of storage account credentials 64
    Maximum number of volume containers 64
    Maximum number of volumes 255
    Maximum number of schedules per bandwidth template 168 A schedule for every hour, every day of the week.
    Maximum size of a tiered volume on physical devices 64 TB for StorSimple 8100 and StorSimple 8600 StorSimple 8100 and StorSimple 8600 are physical devices.
    Maximum size of a tiered volume on virtual devices in Azure 30 TB for StorSimple 8010

    64 TB for StorSimple 8020
    StorSimple 8010 and StorSimple 8020 are virtual devices in Azure that use Standard storage and Premium storage, respectively.
    Maximum size of a locally pinned volume on physical devices 9 TB for StorSimple 8100

    24 TB for StorSimple 8600
    StorSimple 8100 and StorSimple 8600 are physical devices.
    Maximum number of iSCSI connections 512
    Maximum number of iSCSI connections from initiators 512
    Maximum number of access control records per device 64
    Maximum number of volumes per backup policy 24
    Maximum number of backups retained per backup policy 64
    Maximum number of schedules per backup policy 10
    Maximum number of snapshots of any type that can be retained per volume 256 This amount includes local snapshots and cloud snapshots.
    Maximum number of snapshots that can be present in any device 10,000
    Maximum number of volumes that can be processed in parallel for backup, restore, or clone 16
    • If there are more than 16 volumes, they're processed sequentially as processing slots become available.
    • New backups of a cloned or a restored tiered volume can't occur until the operation is finished. For a local volume, backups are allowed after the volume is online.
    Restore and clone recover time for tiered volumes <2 minutes
    • The volume is made available within 2 minutes of a restore or clone operation, regardless of the volume size.
    • The volume performance might initially be slower than normal as most of the data and metadata still resides in the cloud. Performance might increase as data flows from the cloud to the StorSimple device.
    • The total time to download metadata depends on the allocated volume size. Metadata is automatically brought into the device in the background at the rate of 5 minutes per TB of allocated volume data. This rate might be affected by Internet bandwidth to the cloud.
    • The restore or clone operation is complete when all the metadata is on the device.
    • Backup operations can't be performed until the restore or clone operation is fully complete.
    Restore recover time for locally pinned volumes <2 minutes
    • The volume is made available within 2 minutes of the restore operation, regardless of the volume size.
    • The volume performance might initially be slower than normal as most of the data and metadata still resides in the cloud. Performance might increase as data flows from the cloud to the StorSimple device.
    • The total time to download metadata depends on the allocated volume size. Metadata is automatically brought into the device in the background at the rate of 5 minutes per TB of allocated volume data. This rate might be affected by Internet bandwidth to the cloud.
    • Unlike tiered volumes, if there are locally pinned volumes, the volume data is also downloaded locally on the device. The restore operation is complete when all the volume data has been brought to the device.
    • The restore operations might be long and the total time to complete the restore will depend on the size of the provisioned local volume, your Internet bandwidth, and the existing data on the device. Backup operations on the locally pinned volume are allowed while the restore operation is in progress.
    Thin-restore availability Last failover
    Maximum client read/write throughput, when served from the SSD tier* 920/720 MB/sec with a single 10-gigabit Ethernet network interface Up to two times with MPIO and two network interfaces.
    Maximum client read/write throughput, when served from the HDD tier* 120/250 MB/sec
    Maximum client read/write throughput, when served from the cloud tier* 11/41 MB/sec Read throughput depends on clients generating and maintaining sufficient I/O queue depth.

    *Maximum throughput per I/O type was measured with 100 percent read and 100 percent write scenarios. Actual throughput might be lower and depends on I/O mix and network conditions.

    Stream Analytics limits


    Limit identifier Limit Comments
    Maximum number of streaming units per subscription per region 83 To request an increase in streaming units for your subscription beyond 83, contact Microsoft Support.
    Maximum number of inputs per job 60 There's a hard limit of 60 inputs per Azure Stream Analytics job.
    Maximum number of outputs per job 60 There's a hard limit of 60 outputs per Stream Analytics job.
    Maximum number of functions per job 60 There's a hard limit of 60 functions per Stream Analytics job.
    Maximum number of streaming units per job 66 There's a hard limit of 66 streaming units per Stream Analytics job.
    Maximum number of jobs per region 1,500 Each subscription can have up to 1,500 jobs per geographical region.
    Reference data blob MB 5 GB Up to 5 GB when using 1 or more SUs.
    Maximum number of characters in a query 512000 There's a hard limit of 512k characters in an Azure Stream Analytics job query.

    Virtual Machines limits

    Virtual Machines limits

    Resource Limit
    Virtual machines per cloud service 1 50
    Input endpoints per cloud service 2 150

    1 Virtual machines created by using the classic deployment model instead of Azure Resource Manager are automatically stored in a cloud service. You can add more virtual machines to that cloud service for load balancing and availability.

    2 Input endpoints allow communications to a virtual machine from outside the virtual machine's cloud service. Virtual machines in the same cloud service or virtual network can automatically communicate with each other.

    Virtual Machines limits - Azure Resource Manager

    The following limits apply when you use Azure Resource Manager and Azure resource groups.

    Resource Limit
    VMs per subscription 25,0001 per region.
    VM total cores per subscription 201 per region. Contact support to increase limit.
    Azure Spot VM total cores per subscription 201 per region. Contact support to increase limit.
    VM per series, such as Dv2 and F, cores per subscription 201 per region. Contact support to increase limit.
    Availability sets per subscription 2,500 per region.
    Virtual machines per availability set 200
    Proximity placement groups per resource group 800
    Certificates per availability set 1992
    Certificates per subscription Unlimited3

    1 Default limits vary by offer category type, such as Free Trial and Pay-As-You-Go, and by series, such as Dv2, F, and G. For example, the default for Enterprise Agreement subscriptions is 350. For security, subscriptions default to 20 cores to prevent large core deployments. If you need more cores, submit a support ticket.

    2 Properties such as SSH public keys are also pushed as certificates and count towards this limit. To bypass this limit, use the Azure Key Vault extension for Windows or the Azure Key Vault extension for Linux to install certificates.

    3 With Azure Resource Manager, certificates are stored in the Azure Key Vault. The number of certificates is unlimited for a subscription. There's a 1-MB limit of certificates per deployment, which consists of either a single VM or an availability set.

    Note

    Virtual machine cores have a regional total limit. They also have a limit for regional per-size series, such as Dv2 and F. These limits are separately enforced. For example, consider a subscription with a US East total VM core limit of 30, an A series core limit of 30, and a D series core limit of 30. This subscription can deploy 30 A1 VMs, or 30 D1 VMs, or a combination of the two not to exceed a total of 30 cores. An example of a combination is 10 A1 VMs and 20 D1 VMs.

    There are limits, per subscription, for deploying resources using Compute Galleries:

    • 100 compute galleries, per subscription, per region
    • 1,000 image definitions, per subscription, per region
    • 10,000 image versions, per subscription, per region

    Managed Run Command limit

    The maximum number of allowed Managed Run Commands is currently limited to 25.

    Virtual Machine Scale Sets limits

    Resource Limit
    Maximum number of VMs in a scale set 1,000
    Maximum number of VMs based on a custom VM image in a scale set 600
    Maximum number of scale sets per subscription per region 2,500
    Maximum number of nodes supported in VMSS for IB cluster 100

    Dev tunnels limits

    The following limits apply to dev tunnels. The limits reset monthly.

    Resource Limit
    Bandwidth 5 GB per user
    Tunnels 10 per user
    Active connections 20 per port
    Ports 10 per tunnel
    HTTP request rate 1500/min per port
    Data transfer rate Up to 20 MB/s per tunnel
    Max web-forwarding HTTP request body size 16 MB

    To request higher usage limits for dev tunnels, open an issue in our GitHub repo. In the issue, include which limit you'd like increased and why.

    See also