Zimbra's iCal integration isn't perfect. I've been struggling for MONTHS now and haven't been able to seal clients on it because of these issues (I'm an Apple Consultant and iCal not even 90% functional breaks the deal - how about trying to edit the shared calendars?)
I have seen no way to turn off the Alert. If one user has on then all users get the alert in iCal. They will not all push to the iPhone if your users are using active sync. Then they only get their own.
You should make sure that the global settings for calendar alerts are set to never. I think mine were defaulted to 5 minutes or so. |