VM Snapshot info

Author: David Curwin

articles/backup/backup-azure-vms-introduction.md

@@ -21,8 +21,8 @@ Here's how Azure Backup completes a backup for Azure VMs:
 
 1. For Azure VMs that are selected for backup, Azure Backup starts a backup job according to the backup schedule you specify.
 1. During the first backup, a backup extension is installed on the VM if the VM is running.
-    - For Windows VMs, the _VMSnapshot_ extension is installed.
-    - For Linux VMs, the _VMSnapshotLinux_ extension is installed.
+    - For Windows VMs, the [VMSnapshot extension](https://docs.microsoft.com/azure/virtual-machines/extensions/vmsnapshot-windows) is installed.
+    - For Linux VMs, the [VMSnapshotLinux extension](https://docs.microsoft.com/azure/virtual-machines/extensions/vmsnapshot-linux) is installed.
 1. For Windows VMs that are running, Backup coordinates with Windows Volume Shadow Copy Service (VSS) to take an app-consistent snapshot of the VM.
     - By default, Backup takes full VSS backups.
     - If Backup can't take an app-consistent snapshot, then it takes a file-consistent snapshot of the underlying storage (because no application writes occur while the VM is stopped).

articles/virtual-machines/extensions/vmsnapshot-linux.md

@@ -18,6 +18,8 @@ ms.author: trinadhk
 
 Azure Backup provides support for backing up workloads from on-premises to cloud and backing up cloud resources to Recovery Services vault. Azure Backup uses VM snapshot extension to take an application consistent backup of the Azure virtual machine without the need to shutdown the VM. VM Snapshot Linux extension is published and supported by Microsoft as part of Azure Backup service. Azure Backup will install the extension as part of first scheduled backup triggered post enabling backup. This document details the supported platforms, configurations, and deployment options for the VM Snapshot extension.
 
+The VMSnapshot extension appears in the Azure portal only for non-managed VMs.
+
 ## Prerequisites
 
 ### Operating system

articles/virtual-machines/extensions/vmsnapshot-windows.md

@@ -15,6 +15,8 @@ ms.author: trinadhk
 
 Azure Backup provides support for backing up workloads from on-premises to cloud and backing up cloud resources to Recovery Services vault. Azure Backup uses VM snapshot extension to take an application consistent backup of the Azure virtual machine without the need to shutdown the VM. VM Snapshot extension is published and supported by Microsoft as part of Azure Backup service. Azure Backup will install the extension as part of first scheduled backup triggered post enabling backup. This document details the supported platforms, configurations, and deployment options for the VM Snapshot extension.
 
+The VMSnapshot extension appears in the Azure portal only for non-managed VMs.
+
 ## Prerequisites
 
 ### Operating system

articles/virtual-machines/windows/tutorial-backup-vms.md

@@ -31,7 +31,7 @@ You can protect your data by taking backups at regular intervals. Azure Backup c
 
 ## Backup overview
 
-When the Azure Backup service initiates a backup job, it triggers the backup extension to take a point-in-time snapshot. The Azure Backup service uses the _VMSnapshot_ extension. The extension is installed during the first VM backup if the VM is running. If the VM is not running, the Backup service takes a snapshot of the underlying storage (since no application writes occur while the VM is stopped).
+When the Azure Backup service initiates a backup job, it triggers the backup extension to take a point-in-time snapshot. The Azure Backup service uses the [VMSnapshot extension](https://docs.microsoft.com/azure/virtual-machines/extensions/vmsnapshot-windows). The extension is installed during the first VM backup if the VM is running. If the VM is not running, the Backup service takes a snapshot of the underlying storage (since no application writes occur while the VM is stopped).
 
 When taking a snapshot of Windows VMs, the Backup service coordinates with the Volume Shadow Copy Service (VSS) to get a consistent snapshot of the virtual machine's disks. Once the Azure Backup service takes the snapshot, the data is transferred to the vault. To maximize efficiency, the service identifies and transfers only the blocks of data that have changed since the previous backup.
 
@@ -51,8 +51,8 @@ Create a simple scheduled daily backup to a Recovery Services Vault.
 1. In the **Backup** blade for your VM, you'll see the number of restore points that are complete.
 
 
-	![Recovery points](./media/tutorial-backup-vms/backup-complete.png)
-	
+    ![Recovery points](./media/tutorial-backup-vms/backup-complete.png)
+    
 The first backup takes about 20 minutes. Proceed to the next part of this tutorial after your backup is finished.
 
 ## Recover a file
@@ -63,13 +63,13 @@ In this example, we show how to recover the image file that is used in the defau
 
 1. Open a browser and connect to the IP address of the VM to show the default IIS page.
 
-	![Default IIS web page](./media/tutorial-backup-vms/iis-working.png)
+    ![Default IIS web page](./media/tutorial-backup-vms/iis-working.png)
 
 1. Connect to the VM.
 1. On the VM, open **File Explorer** and navigate to \inetpub\wwwroot and delete the file **iisstart.png**.
 1. On your local computer, refresh the browser to see that the image on the default IIS page is gone.
 
-	![Default IIS web page](./media/tutorial-backup-vms/iis-broken.png)
+    ![Default IIS web page](./media/tutorial-backup-vms/iis-broken.png)
 
 1. On your local computer, open a new tab and go the [Azure portal](https://portal.azure.com).
 1. In the menu on the left, select **Virtual machines** and select the VM from the list.