Update backup-support-matrix-iaas.md

Author: cynthn

articles/backup/backup-support-matrix-iaas.md

@@ -53,7 +53,7 @@ Multiple Backups Per Day   |  Supported, using _Enhanced policy_ (in preview). T
 
 ## Operating system support (Windows)
 
-The following table summarizes the supported operating systems when backing up Windows Azure VMs.
+The following table summarizes the supported operating systems when backing up Azure VMs running Windows.
 
 **Scenario** | **OS support**
 --- | ---
@@ -222,7 +222,7 @@ Network traffic to Azure:
 Data security:
 
 - When backing up Azure VMs, you need to set up encryption *within* the virtual machine.
-- Azure Backup supports Azure Disk Encryption, which uses BitLocker on Windows virtual machines and us **dm-crypt** on Linux virtual machines.
+- Azure Backup supports Azure Disk Encryption, which uses BitLocker on virtual machines running Windows and uses **dm-crypt** on Linux virtual machines.
 - On the back end, Azure Backup uses [Azure Storage Service encryption](../storage/common/storage-service-encryption.md), which protects data at rest.
 
 **Machine** | **In transit** | **At rest**
@@ -255,4 +255,4 @@ On-premises/Azure VMs with MABS | ![Yes][green] | ![Yes][green]
 
 [green]: ./media/backup-support-matrix/green.png
 [yellow]: ./media/backup-support-matrix/yellow.png
-[red]: ./media/backup-support-matrix/red.png
+[red]: ./media/backup-support-matrix/red.png