Shared Google Calendars

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He guys,

I'm new to using Zimbra Desktop. I am trying to use it for my Google Apps accounts and I cannot seem to figure out a way to view shared calendars. Is there any work around that anyone has come up with or maybe there is a way that I can't figure out to do this? The primary calendar for each account shows up fine but any other calendars that are viewable on Google are not visible in Zimbra. Thanks ahead of time for any help. Forgive me if this has already been covered in previous threads but I searched for it and could not find anything.