Now the Public Folder will appear under Favorites: In order to access Public Folders in OWA, perform the following steps: Read the Knowledge Base article How To Open Public Folders In Outlook 2011/2016 For Mac for more information. In order to use Public Folders on Mac you would need to subscribe to the Public Folder. To access Public Folders in Outlook for Windows navigate to Folders tab > Public Folders > select necessary folder: Read the Knowledge Base article on What Is An Autodiscover Record And Why Do I Need It? for more information. To view Public Folder(s) in your Outlook client, make sure an Autodiscover record is created for your domain.
Public Folders starting from Exchange 2013 and later versions require an Autodiscover record to be set up.
Read the Knowledge Base article on How To Create And Manage A Shared Calendar In Public Folders On Exchange to create Public Folders.