Cannot delete subnet delegated to Microsoft.PowerPlatform/vnetaccesslinks

Question

Hi

I am trying to delete a virtual network.

however, there is one subnet that is delegated to " Microsoft.PowerPlatform/vnetaccesslinks" which I cannot undelegate.

How do I delete the virtual network if the subnet cannot be undelegated?

I also tried via CLI:

az network vnet subnet update --resource-group xxx --name xxx --vnet-name xxx --remove delegations

And received the same error message:

(SubnetMissingRequiredDelegation) Subnet /subscriptions/xxx/resourceGroups/xxx/providers/Microsoft.Network/virtualNetworks/xxx/subnets/xxx requires any of the following delegation(s) [Microsoft.PowerPlatform/vnetaccesslinks] to reference service association link /subscriptions/xxx/resourceGroups/xxx/providers/Microsoft.Network/virtualNetworks/xxx/subnets/xxx/serviceAssociationLinks/PowerPlatformSAL.

Code: SubnetMissingRequiredDelegation

Message: Subnet /subscriptions/xxx/resourceGroups/xxx/providers/Microsoft.Network/virtualNetworks/xxx/subnets/xxx requires any of the following delegation(s) [Microsoft.PowerPlatform/vnetaccesslinks] to reference service association link /subscriptions/xxx/resourceGroups/xxx/providers/Microsoft.Network/virtualNetworks/xxx/subnets/xxx/serviceAssociationLinks/PowerPlatformSAL.

I also tried to remove the service associtation link via the rest-api

az rest --method delete --uri https://management.azure.com/subscriptions/xxx/resourceGroups/xxx/providers/Microsoft.Network/virtualNetworks/xxx/subnets/xxx/providers/Microsoft.PowerPlatform/serviceAssociationLinks/default?api-version=2018-10-01

Does not work:

"Message":"No HTTP resource was found that matches the request URI

I looked at the Azure Resource Explorer

I see that the "allowDelete" flag is false

We use this network to test our IaaC deployment which now fails every time, so how can we remove this ?

Answer 1

Hi CUIJPERS Gerard,

Welcome to the Microsoft Q&A Platform. Thank you for posting a detailed question here.

Given the error mentioned, it appears that the deletion process is being blocked on the backend. You will need to submit a support request to remove the subnet delegation and delete the Virtual Network. If you have a support plan, please file a support ticket. If you do not have a support plan and need assistance with one-time free technical support, please let us know.

Refer to how create support ticket: How to create an Azure support request - Azure supportability | Microsoft Learn

Another likely cause of this issue might be "When you remove the last gateway associated to a gateway/subnet, it might take up to 48-72 hours before you can delete the subnet or VNet."

Refer this documentation

Similar issue: https://learn.microsoft.com/en-us/answers/questions/1290926/cannot-delete-subnet-delegated-to-microsoft-powerp

Please "Accept the answer" if the information helped you. This will help us and others in the community as well.