Merge pull request #107496 from dlepow/acrfix4

[ACR] Private link prereq

Author: PRMerger13

articles/container-registry/container-registry-private-link.md

@@ -23,7 +23,14 @@ This feature is available in the **Premium** container registry service tier. Fo
 ## Prerequisites
 
 * To use the Azure CLI steps in this article, Azure CLI version 2.2.0 or later is recommended. If you need to install or upgrade, see [Install Azure CLI][azure-cli]. Or run in [Azure Cloud Shell](../cloud-shell/quickstart.md).
-* If you don't already have a container registry, create one (Premium tier required) and push a sample image such as `hello-world` from Docker Hub. For example, use the [Azure portal][quickstart-portal] or the [Azure CLI][quickstart-cli] to create a registry. 
+* If you don't already have a container registry, create one (Premium tier required) and push a sample image such as `hello-world` from Docker Hub. For example, use the [Azure portal][quickstart-portal] or the [Azure CLI][quickstart-cli] to create a registry.
+* If you want to configure registry access using a private link in a different Azure subscription, you need to register the resource provider for Azure Container Registry in that subscription. For example:
+
+  ```azurecli
+  az account set --subscription <Name or ID of subscription of private link>
+
+  az provider register --namespace Microsoft.ContainerRegistry
+  ``` 
 
 The Azure CLI examples in this article use the following environment variables. Substitute values appropriate for your environment. All examples are formatted for the Bash shell: