Maybe add a checkbox option in policy to enable reboots triggered by syncro windows updates put the asset in maintained mode for 30 min or something.
I have servers set to update Friday nights and I get flooded with 20-30 offline alerts as they reboot.
You can schedule a script that has the option set for maintenance mode for the time period you do reboots, that should take care of it. The script doesn’t have to have anything any it iirc. It would make sense to have this part of the patch policy itself though.