Using Public Folders in Exchange Server 2013

          Public folders use for sharing information between groups of users. With public folders, multiple users can access a shared folder in Outlook.
• Public folders are stored in a special type
of mailbox called a public folder mailbox that the public folder mailboxes are stored in regular mailbox databases and stores the public folder hierarchy as well as the public folder contents.
• Public folder mailboxes can be stored in mailbox databases that are part of a DAG. In previous versions of Exchange Server, public folders used a public folder replication process to enable redundancy. By storing the public folder mailboxes in a mailbox database that is part of a DAG, you can provide high availability for the public folder deployment using the same mechanism as the one used for providing high availability for mailboxes.
• Public folders are spread across multiple public folder mailboxes. In Exchange Server 2013, you can create public folders and store the public folders in different mailboxes, which can be located on Mailbox servers in different locations.
• Public folders are accessed by clients only for Outlook 2007 or later. In Exchange Server 2013,
Outlook Web App clients cannot access the public folders. In Exchange Server 2013 CU1, you can add public folders located on Exchange 2013 as Favorites in Outlook Web App.