Merge pull request #95116 from yuvalherziger/aca-acr-note-admin-acct

Important note on prerequisite to pull images from ACR into ACA

Author: Jak-MS

articles/container-apps/containers.md

@@ -195,6 +195,11 @@ You can use an Azure managed identity to authenticate with Azure Container Regis
 - Assign a system-assigned or user-assigned managed identity to your container app.
 - Specify the managed identity you want to use for each registry.
 
+> [!NOTE]
+> You will need to [enable an admin user account](../container-registry/container-registry-authentication.md) in your Azure
+> Container Registry even when you use an Azure managed identity.  You will not need to use the ACR admin credentials to pull images into Azure
+> Container Apps, however, it is a prequisite to have the ACR admin user account enabled in the registry Azure Container Apps is pulling from.
+
 When assigned a managed identity to a registry, use the managed identity resource ID for a user-assigned identity, or "system" for the system-assigned identity. For more information about using managed identities see, [Managed identities in Azure Container Apps Preview](managed-identity.md).
 
 ```json