Retirement: Azure Load Balancer Inbound NAT rule V1 for Azure VMs and Azure VMSS will be retired

On September 30, 2027, Inbound NAT rule V1 for Azure Virtual Machines and Azure Virtual Machine Scale Sets in Azure Load Balancer will be retired. To avoid service disruptions, you’ll need to migrate to Inbound NAT rule V2 by that date.

As part of this retirement, you’ll no longer be able to create new instances of Inbound NAT rule V1 starting September 30, 2026. We recommend migrating to Inbound NAT rule V2 before that date to take advantage of additional benefits, including:   

• Improved automatic scaling of NAT rules when backend instances are added or removed.  
• Simplified deployments and management.  
• Port mapping between NAT rules and backend instances. 

To avoid service disruptions, migrate to Inbound NAT rule V2 in Azure Load Balancer by September 30, 2027.