1. Open Outlook and look for the ellipsis towards the bottom of the window. 

2.Click on Folders from within the pop-up menu


3. Public Folders will now appear as a folder in your list of mailboxes.

4. Follow the folder structure to locate the folder/calendar you wish to add and click on the selection


5. You can add the selection to your favorites for quicker navigation by right clicking and selecting “Add to Favorites”