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I'm trying to include in an app service an existing VNET but I have this issue:
Failed to add delegation to the existing subnet.: Delegations of subnet /subscriptions Cannot be changed from [] to [Microsoft.Web/serverfarms] because it is being used by the resource
Azure Limitation ? How many resources can be used by one VNET ?
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Subnet delegation enables you to designate a specific subnet for an Azure PaaS service of your choice that needs to be injected into your virtual network. Subnet delegation provides full control to the customer on managing the integration of Azure services into their virtual networks.
During the creation of a VNet while using the Azure portal, the requirement is for you to define one subnet, even though a VNet isn't required to have any subnets. In the portal, you can define only one subnet when you create a VNet.
The limit is that you have to use an unused subnet for your app service integration When you add VNet (preview) in the networking configuration of app service. Please check if you have any VM resources in that subnet. If it is, you could create an empty subnet for the VNet integration. Read more details here.
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