Once logged into the Outlook Web App, select the Menu grid icon in the top left corner.
Select the Calendar.
On the left pane, right click Other Calendars and select Add public folder to Favorites.
Scroll down to your Campus Folder/Calendar, for example the “OH Stowe” folder and then expand it, select the calendar you want, then choose Add to Favorites located at the top.
The calendar will be located under Other Calendars.