This article will show you how to access Public Folders within the Outlook Web App 2013
1. Log into OWA 2013. https://na02.msexchangeoutlook.com
2. Right click on Favorites in the left column.
3. Select Add Public Folder.
4. Select the folder you want to add. Please note: Public folders can only be added one at a time.
5. Click Add. Folder will now appear in the Favorites menu in OWA.