Hmm so if I have understood correctly Moodle and Zimbra are not accessible with a single username and password (SSO) at the current time? This is going to be fun if that's the case. As time goes on I feel this isn't going to be a smooth switch over whatsoever. I hope I'm wrong!
The logon is supposed to be ready for the single signon system they are implementing. We are all changing from BGFL Plus - single sign on for mail, VLE to 2 different systems - Moodle and Zimbra. So one would have assumed that the username would be the same for both. Wrong - I've been told the username format for Moodle is different because that is internal not external!!! We're having our Moodle training tomorrow so I'll find out more then.