@Babarske ,
Welcome to the Microsoft Q&A forum. I understand you are trying to Migrate your Classic AFD to standard/premium AFD and you are getting the error Frontdoor application does not have read permission for the key vault
.
As per the Prerequisite section of the Migration documentation here can you please confirm if you have added the Microsoft.AzureFrontDoor-Cdn
as an app in your Azure Active Directory and have granted Microsoft.AzureFrontDoor-Cdn
access to your Key Vault?
You can follow the steps mentioned here for implementation.
Note- The Application Id of 205478c0-bd83-4e1b-a9d6-db63a3e1e1c8 is predefined by Azure for Front Door Standard and Premium tier across all Azure tenants and subscriptions. Azure Front Door (Classic) has a different Application Id.
Hope this helps! Please let me know if the issue still exists. Thank you!