It sounds like voodoo but Timothy's work around did indeed fix the problem for me, probably only temporarily though. https://bugs.launchpad.net/ubuntu/+source/evolution-exchange/+bug/207723/comments/37
In summary, and assuming your setup worked and then mysteriously stopped working: 1. Delete your mailbox name from the Exchange 2. Authenticate
It sounds like voodoo but Timothy's work around did indeed fix the problem for me, probably only temporarily though. /bugs.launchpad .net/ubuntu/ +source/ evolution- exchange/ +bug/207723/ comments/ 37
https:/
In summary, and assuming your setup worked and then mysteriously stopped working:
1. Delete your mailbox name from the Exchange
2. Authenticate