When your campus is closed or a room needs maintenance, you can block out dates by creating events to ensure you don't book anything during those times.
Create Block Out Events
Create an event that will act as a placeholder for the date(s) you want to block out.
Add the appropriate tag to the event.
Add Main Rooms
On the Reservation Block, add the main rooms to ensure no one requests to schedule them.
If someone requests to schedule the rooms for an event, they'll create a conflict, and your Conflict Resolver can reject the request due to the block out.
Remove Event from Calendar
Uncheck the boxes for Public Visibility, so this event is hidden from your main calendars.
You'll see the event on the Admin calendar and can reject any events that conflict with the dates.