Merge pull request #301787 from craigshoemaker/patch-15

[SRE Agebt] Update: Usage -> update prereqs

Author: prmerger-automator[bot]

articles/sre-agent/usage.md

@@ -36,6 +36,14 @@ You need to grant your agent the correct permissions and access to the right nam
 
 * **Security context**: Before you can create a new agent, make sure your user account has the `Microsoft.Authorization/roleAssignments/write` permissions using either [Role Based Access Control Administrator](/azure/role-based-access-control/built-in-roles) or [User Access Administrator](/azure/role-based-access-control/built-in-roles).
 
+* **Associate your allow list subscription ID**: Make sure your Azure CLI session is set to 
+the subscription ID on the preview allow list. If you need to set the CLI context to your 
+subscription ID, use the following command:
+
+    ```azurecli  
+    az account set --subscription "<SUBSCRIPTION_ID>"
+    ```
+
 * **Namespace**: Using the cloud shell in the Azure portal, run the following command:
 
     ```azurecli