Open the Folder List view in Outlook
This is accessible from the bottom left corner of Outlook along with the Mail, Calendar, People & Task views. You may need to click and expansion arrow or “…” to make all of the fields visible
You can also access this view directly by pressing Ctrl+6 while in Outlook.
In the left hand window, you will see your mailbox folder structure. If necessary, scroll all the way to the bottom of the window on the left with this folder heirarchy until you see “Public Folders - <your email address>”
Underneath this you should see subfolders “All Public Folders” and “Favorites” - the latter of which may contain no subfolders. Expand “All Public Folders” by clicking on the arrow on the left.
Underneath this there is a “Calendars” subfolder which can again be expanded
Any calendar which you have permission to access can be viewed after selecting.
From here you can individually right click on each Calendar you have permissions to and Select “Add to Favorites…” which will populate the “Favorites” subfolder below.
From here, you can go to your Calendar view in Outlook and these favorited public folders will be viewable under the “Other” or “Other Calendars” heading