Merge pull request #288042 from maud-lv/ml-g-umi

Update managed identity docs

Author: v-dirichards

articles/managed-grafana/how-to-authentication-permissions.md

@@ -141,12 +141,10 @@ The Azure Monitor data source is automatically added to all new Managed Grafana
    :::image type="content" source="media/data-sources/configuration.png" alt-text="Screenshot of the Add data sources page.":::
 
 1. Azure Monitor is listed as a built-in data source for your Managed Grafana instance. Select **Azure Monitor**.
-1. In the **Settings** tab, authenticate through **Managed Identity** and select your subscription from the dropdown list or enter your **App Registration** details
+1. In the **Settings** tab, authenticate through **Managed Identity** and select your subscription from the dropdown list, or alternatively enter your **App Registration** details. When you select **Managed identity**, the authentication and authorization are made through the system-assigned or the user-assigned managed identity you [configured in your Azure Managed Grafana workspace](how-to-authentication-permissions.md). Using a managed identity lets you assign permissions for your Managed Grafana instance to access Azure Monitor data without having to manually manage service principals in Microsoft Entra ID.
 
    :::image type="content" source="media/data-sources/configure-Azure-Monitor.png" alt-text="Screenshot of the Azure Monitor page in data sources.":::
 
-Authentication and authorization are made through the provided managed identity. Using managed identity, lets you assign permissions for your Managed Grafana instance to access Azure Monitor data without having to manually manage service principals in Microsoft Entra ID.
-
 ### [Azure CLI](#tab/azure-cli)
 
 Run the [az grafana data-source update](/cli/azure/grafana/data-source#az-grafana-data-source-update) command to update the configuration of your Azure Monitor data sources using the Azure CLI.
@@ -187,9 +185,6 @@ az grafana data-source update --data-source 'Azure Monitor' --name <instance-nam
 
 ---
 
-> [!NOTE]
-> User-assigned managed identity isn't currently supported.
-
 ### Azure Data Explorer
 
 To learn how to configure Azure Data Explorer, go to [Configure Azure Data Explorer](how-to-connect-azure-data-explorer.md).

articles/managed-grafana/how-to-data-source-plugins-managed-identity.md

@@ -4,7 +4,7 @@ titlesuffix: Azure Managed Grafana
 description: Learn about current technical or feature limitations you may encounter in the Azure Managed Grafana service.
 ms.service: azure-managed-grafana
 ms.topic: troubleshooting
-ms.date: 09/25/2024
+ms.date: 10/08/2024
 ms.author: malev
 ms.custom: engagement-fy23
 author: maud-lv
@@ -60,7 +60,11 @@ Each data source also has its own limits that can be reflected in Azure Managed
 * Refer to [Azure Monitor](/azure/azure-monitor/service-limits) to learn about Azure Monitor service limits including alerts, Prometheus metrics, data collection, logs and more.
 * Refer to [Azure Data Explorer](/azure/data-explorer/kusto/concepts/querylimits) to learn about Azure Data Explorer service limits.
 
-## Next steps
+## Managed identities
+
+Each Azure Managed Grafana instance can only have one user-assigned managed identity, or one user-assigned managed identity assigned.
+
+## Related links
 
 > [!div class="nextstepaction"]
 > [Troubleshooting](./troubleshoot-managed-grafana.md)