When you’re scheduling a meeting, you’ll want to be sure you have a meeting space available. You can view which rooms or other shared resources are available for your meeting and reserve them right from your Calendar. Rooms and other resources are created by your Exchange server administrator.
You can use the Room Finder to check a room’s availability for a specific time.
After adding a room to a meeting request, check the Room Finder pane for availability.
If you look at the Room Finder pane, and it says “none” under the Choose an available room heading, it will suggest some other times when a room is available.
If the Room Finder does not appear automatically after adding a room to a meeting, you can open it by clicking the Room Finder button in the Options group of the Meeting tab.
Select a time from the Suggested times list.
The meeting time is moved to the available time slot.