Merge pull request #173804 from shants123/patch-33

Update maintenance-control.md

Author: PRMerger13

articles/virtual-machines/maintenance-control.md

@@ -28,7 +28,7 @@ With maintenance control, you can:
 ## Limitations
 
 - VMs must be on a [dedicated host](./dedicated-hosts.md), or be created using an [isolated VM size](isolation.md).
-- The maintenance window duration must be 2 hours or more. Maintenance window duration is the time from when the customer initiates the update to the time it completes. 
+- Maintenance window duration can vary month over month and sometimes it can take upto 2 hours to apply the pending updates once it is initiated by the user.  
 - After 35 days, an update will automatically be applied.
 - User must have **Resource Contributor** access.