You cannot use the Global Address Book from a phone or in the Mail App on a Mac.
Imported ‘All Day Events’ from FirstClass come in as 12:00am-11:59pm and have to be manually flipped to ‘All Day’ in Zimbra.
You cannot email a Forum, you must go to the Forum to post.
For some people setting an email signature in Zimbra, will give an ‘Missing Value’ error, if you are having problems setting a signature use the Chrome web browser.
Fixed and working – Email notifications from Forums are not working, if you subscribe to a Topic or Thread you will see the notification in Forums but not receive the email.