1. How to add scheduled downtime.
You can temporally disable alert email when you don't want to be disturbed.
Example of scheduled downtime (Patch maintenance, temporally OS shutdown, hardware upgrade)
1-1. Login to UMM
Select Scheduled downtime
1-2. Click Create.
1-3. Enter Description and set parameters. Then Click Add.
1-4. Confirm Scheduled Downtime.
Scheduled downtime is automatically deleted when sleep time has expired.