http://blogs.technet.com/b/mspfe/archive/2013/03/26/new-age-collaboration-with-exchange-2013-and-sharepoint-2013-part-1.aspx

New Age Collaboration with Exchange 2013 and SharePoint 2013 – Part 1

Lalita Jat is a Premier Field Engineer from India who works on Exchange Server technologies. In this post she talks about Site Mailboxes, an exciting new collaboration feature.