Zarafa

Zarafa is a software package that allows you to share e-mail and calendars via Outlook, on your PDA or through our Webaccess. Using Zarafas offline features, you can even work while out of the office. The Zarafa Webaccess features the familiar Outlook interface, and you can keep using the features in Outlook that have always allowed you to work efficiently;

You can get detailed information about connector on the product page http://www.zarafa.com/

Source: http://www.zarafa.com/