Unable to delete VNet due to serviceAssociationLinks/AppServiceLink

Hi @Noora Kazi

Could you please try the following Azure CLI command to delete the link?

az rest --method POST --uri "/subscriptions/<sub-id>/providers/Microsoft.Web/locations/<location>/purgeUnusedVirtualNetworkIntegration?api-version=2024-04-01" --body "{'subnetResourceId': '<subnet-resource-id>'}"

• sub-id : Subscription of the virtual network , e.g. c02xxx4a-xxxx-xxxx-xxxx-1864bxxxx43
• location : Location of the virtual network, e.g. northeurope (as shown in ASC VNet location property, other variations such as display name may work)
• subnet-resource-id : Full resource id of the subnet containing the offending orphaned SAL, e.g. /subscriptions/c02xxx4a-xxxx-xxxx-xxxx-1864bxxxx43/resourceGroups/gateway/providers/Microsoft.Network/virtualNetworks/vnetgw/subnets/GatewaySubnet
• After receiving "Purged unused virtual network integration." and, and try to delete the subnet through the GUI.

Reference Doc: https://learn.microsoft.com/en-us/azure/app-service/overview-vnet-integration#method-1-purging-orphaned-service-association-links-sal

az rest --method POST --uri "/subscriptions/<subscription id>/providers/Microsoft.Web/locations/eastus2/purgeUnusedVirtualNetworkIntegration?api-version=2024-04-01" --body "{ "subnetResourceId": "/subscriptions/<subscription id>/resourceGroups/rg-chat-baseline-aifchat/providers/Microsoft.Network/virtualNetworks/vnet-workload/subnets/snet-agentsEgress" }"

{

"message": "Purged unused virtual network integration.",

"swiftVirtualNetwork": null

}

and when I try to delete the subnet from the portal, I get the same error.

Failed to delete subnet

Failed to delete subnet 'snet-agentsEgress'. Error: Subnet snet-agentsEgress is in use by /subscriptions/<subscription id>/resourceGroups/rg-chat-baseline-aifchat/providers/Microsoft.Network/virtualNetworks/vnet-workload/subnets/snet-agentsegress/serviceAssociationLinks/legionservicelink and cannot be deleted. In order to delete the subnet, delete all the resources within the subnet. See aka.ms/deletesubnet.

@Noora Kazi
Before deleting the subnet, verify that no other resources (such as Azure Container Instances or Network Interfaces) are linked to it. If any dependencies exist, remove those resources first to avoid errors.
Official references:

• https://learn.microsoft.com/en-us/troubleshoot/azure/azure-kubernetes/error-codes/publicipaddr-inusesubnet-netsecgrp-error?wt.mc_id=knowledgesearch_inproduct_azure-cxp-community-insider
• https://learn.microsoft.com/en-us/azure/virtual-network/virtual-network-troubleshoot-cannot-delete-vnet?wt.mc_id=Portal-Microsoft_Azure_Support#troubleshooting-steps