update intstructions

Author: PatrickFarley

articles/ai-services/openai/concepts/use-your-data.md

@@ -349,18 +349,20 @@ You can deploy to a standalone Teams app directly from Azure OpenAI Studio. Foll
 
 1. Provision your app: (detailed instructions in [Provision cloud resources](/microsoftteams/platform/toolkit/provision))
 
-1. Assign the **Cognitive Service OpenAI User** role to your deployed App Service resource 
-    1. Go to the Azure portal and select the newly created Azure App Service resource
-    1. Go to **settings** -> **identity** -> **enable system assigned identity** 
-        1. Select **Azure role assignments** and then **add role assignments**. Specify the following parameters:
-           * Scope: resource group 
-           * Subscription: the subscription of your Azure OpenAI resource 
-           * Resource group of your Azure OpenAI resource 
-           * Role: **Cognitive Service OpenAI user**  
+1. Assign the **Cognitive Service OpenAI User** role to your deployed **User Assigned Managed Identity** resource of your custom copilot. 
+    1. Go to the Azure portal and select the newly created **User Assigned Managed Identity** resource for your custom copilot.
+    1. Go to **Azure Role Assignments**.
+    1. Select **add role assignment**. Specify the following parameters:
+        * Scope: resource group 
+        * Subscription: the subscription of your Azure OpenAI resource 
+        * Resource group of your Azure OpenAI resource 
+        * Role: **Cognitive Service OpenAI user**  
 
 1. Deploy your app to Azure by following the instructions in [Deploy to the cloud](/microsoftteams/platform/toolkit/deploy). 
 
 1. Publish your app to Teams by following the instructions in [Publish Teams app](/microsoftteams/platform/toolkit/publish).
+    > [!IMPORTANT]
+    > Your Teams app is intended for use within the same tenant of your Azure account used during setup, as it is securely configured by default for single-tenant usage. Using this app with a Teams account not associated with the Azure tenant used during setup will result in an error.
 
 The README file in your Teams app has additional details and tips. Also, see [Tutorial - Build Custom Copilot using Teams](/microsoftteams/platform/teams-ai-library-tutorial) for guided steps.