Can I use iSync to synchronize calendars and share contacts on Zimbra?
No. iSync is not recommended at this time, but upcoming releases of Zimbra appear to address some of the limitations with iSync. These enhancements will be thoroughly tested and implemented as they become available. • Calendars you subscribe to from either the Zimbra Web client and in iCal are not included with the calendars are synchronized. • iSync is not recommended for sharing contacts. iSync causes shared contacts to be saved locally (on the workstation) of the person you are sharing with. These locally stored contacts can never be recalled. • Complicated CalDAV configuration and management. • iSync only works with Mac OS versions 10.4.6 and newer/greater.