It was requested that we have one location to view OOO schedules for everyone. This will allow you to see at a glance everyone that is out and if there is any concern with overlap. This is not needed for appointments throughout the day, just true vacation time.
When you need to put vacation time on the calendar, select OOO as the calendar. Invite yourself to the event. And in the Event name use the following formula "Annie - OOO."