I installed Zimbra Desktop and I've configured my google Imap account. I have an option in the setup which is called "sync all calendars", but this isn't working. I can't see my google calendars.
I've tried to create a new calendar in Zimbra Desktop and added my .ics adress of my google calender. That was working but only from google to ZDesktop. I couldn't create new events on the google calender.

Is there any way of bidirectional syncing between google calendar and Zimbra Desktop?
Google Calendar also supports CalDAV.

Thanks and greets