I have a mixed EX2003 and EX2010 organisation. I have one mailbox moved across to the EX2010 for testing and I'm having the following issues.
1. Out of Office does not work from the 2007 Outlook Client, reporting that that the server is unavailable. I am however able to administer OOO from that mailbox's OWA.
2. The mailbox is unable to see Calenadrs it previously had access to on the EX2003 servers.
3. On starting up the 2007 Outlook client is complains about the certificate which references the Domain name of the EX2010 CAS server - EXLON
Saying that the name on the certificate does not match.
The server has a third party certificate installed for OWA purposes which references mailgate.mydomain.com
I think it's something to do with the Autodiscover service but don't really know where to look.