I have a MAC Book Air with Outlook 2011. It sends and receives e-mail via Exchange 2007 no problem - new e-mail appears immediately and send e-mail goes straight away. But if I read a message, move it or delete it the changes are not reflected in Exchange. I don't have the problem with OWA or iPhone on the same mailbox - just Outlook 2011. The problem appeared to start with no obvious trigger. I deleted the entire profile from the MAC and started again but after the profile was rebuilt the same problem occurred. Any ideas gratefully received!