1. Open Outlook and switch to your Calendar.
  2. from the Ribbon
    1. Windows: choose Open Calendar or  Add Calendar then Open Shared Calendar...

       

    2. macOS: choose Open Shared Calendar.



  3. In the Search field, type the name of the calendar and press enter. You can only add calendars for which you have permission.

Examples:

Notes:

You will now see your additional calendars listed in the left side bar.

To view a specific calendar, put a check mark in the box next to it.

To create/edit/delete a booked event (you must have read & write access), double click on the day to open the Untitled - Event window. Be sure to Save & Close any changes that are made.