Zarafa Outlook Sharing is a Microsoft Exchange replacement. The Open Source Collaboration provides an integration with your existing Linux mail server, native mobile phone support by ActiveSync compatiblity and a webaccess with 'Look & Feel' similar to Outlook using Ajax. Including an IMAP4 and a POP3 gateway as well as an iCal/CalDAV gateway, Zarafa can combine the usability with the stability and flexibility of a Linux server.

The proven Zarafa groupware solution is using MAPI objects, provides a MAPI client library as well as programming interfaces for C++, PHP and Perl. The other Zarafa related packages need to be installed to gain all the features and benefits of Zarafa Outlook Sharing and Open Source Collaboration.