Azure Backup now supports network-restricted storage accounts
Updated: April 19, 2018
Azure infrastructure as a service (IaaS) virtual machine backup now supports network-restricted storage accounts.
Use storage firewalls and virtual networks to allow traffic only from selected virtual networks and subnets. This helps you create a secure network boundary for your unmanaged disks in storage accounts. You can also grant access to on-premises networks and other trusted internet traffic by using network rules based on IP address ranges.
With this announcement, you can perform scheduled and ad-hoc IaaS virtual machine backups and restores for virtual network-configured storage accounts.
For more information, see the full blog post.