I have just one user who keeps getting a password prompt to sign into the Exchange server. We use Outlook 2007 with a single Exchange 2010 Server. We have two DCs and the Exchange server is one of them. It seems that it has something to do with his user account.
If I delete his profile and run the Outlook setup wizard it detects his username but for his email address it come up as: firstname.lastname@example.org
Everyone else that runs through the Outlook wizard comes up with there email address.
I've tried different PCs to rule out his computer. I don't see anything abnormal in his account setup.
Any suggestions? Thanks in advance