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Unable to delete subnet due to Microsoft.App/environments delegation

Hyokyoung Park 45 Reputation points Microsoft Employee
2026-03-06T03:04:07.8933333+00:00

Hello,

I am unable to delete the subnet in VNet.

The subnet still has the delegation Microsoft.App/environments, and when I try to remove the delegation, I receive the following error:

SubnetMissingRequiredDelegation: The subnet requires delegation [Microsoft.App/environments] to reference serviceAssociationLink ... /serviceAssociationLinks/legionservicelink.

It appears that the subnet is blocked by an orphaned Service Association Link related to Microsoft.App/environments.

Could you please confirm whether backend cleanup is required and help remove the remaining Service Association Link / delegation so that I can delete the subnet and the resource group?.

Thank you

Azure Private Link
Azure Private Link

An Azure service that provides private connectivity from a virtual network to Azure platform as a service, customer-owned, or Microsoft partner services.

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  1. Ravi Varma Mudduluru 10,135 Reputation points Microsoft External Staff Moderator
    2026-03-06T03:36:54.6066667+00:00

    Hello @ Hyokyoung Park,

    Thank you for reaching the Microsoft Q&A.

    The backend team has manually removed the SAL. Could you try saving or deleting the subnet settings?

    If the answer is helpful, please click "Accept Answer" and kindly "upvote" it. If you have extra questions about this answer, please click "Comment".

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