Rephrasing restriction.

Author: roygara

includes/virtual-machines-disks-expand-without-downtime-restrictions.md

@@ -10,7 +10,7 @@
  ms.custom: include file
 ---    
 - Only supported for data disks.
-- If a disk is 4 TiB or less, you can't expand it beyond 4 TiB without deallocating the VM and detaching the disk. If a disk is already greater than 4 TiB, you can expand it without deallocating the VM and detaching the disk.
+- If a disk is 4 TiB or less, you should deallocate your VM and detach the disk before expanding it beyond 4 TiB. If a disk is already greater than 4 TiB, you can expand it without deallocating the VM and detaching the disk.
 - Not supported for Ultra disks or Premium SSD v2 disks.
 - Not supported for shared disks.
 - Install and use either: