AZ303-VNET PEERING

 

You can't add address ranges to, or delete address ranges from a virtual network's address space once a virtual network is peered with another virtual network. To add or remove address ranges, delete the peering, add or remove the address ranges, then re-create the peering. 

 

 

 

The peering status is "Disconnected"

To resolve this issue, delete the peering from both virtual networks, and then re-create them.