Merge pull request #174543 from shants123/patch-34

Update maintenance-control.md

Author: PRMerger10

articles/virtual-machines/maintenance-control.md

@@ -30,6 +30,7 @@ With maintenance control, you can:
 - VMs must be on a [dedicated host](./dedicated-hosts.md), or be created using an [isolated VM size](isolation.md).
 - 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.
+- Rack level maintenance activities are not yet part of this maintenance control.
 - User must have **Resource Contributor** access.
 
 ## Management options