First of all, note that Outlook synchronization works only on MS Windows (version 2000, XP and up) with Outlook (version 2000, 2002, 2003, XP, 2007).

The Outlook synchronization is implemented as a Java applet. This applet is loaded into your browser and executed by a special Java plug-in. You need the Java runtime environment 1.5 or better, which is supported by all current browsers.