...
Add a recurrence - If an appointment or meeting is repeated on a regular schedule, you can add a recurrence instead of creating an event for each instance.
Scheduling assistant - The scheduling assistant is a useful tool for determining common availability for meeting times. It allows you to simultaneously view the calendars of all invited people (if they have a UWaterloo email account) and rooms, and it will suggest meetings times with the fewest conflicts.Scheduling Assistant - Outlook
Step-by-step guide to create an appointment or meeting
...