We are running Exchange 2007 on a Windows Server 2008 server. I have a user whose name seems to display incorrectly sometimes. It seems to only happen on calendar appointments that he creates (when it tells who the owner of the appointment is). It does not happen if he is just an invitee of an appointment or in emails. What appears instead of his name is (we think) his legacyExchangeDN value. I believe that's what it's called; either that or X.500 Address. The string is "/o=Example/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=juser".
I went back through my documentation on how I set up his account. The only thing that I see is different has to do with the Alias. On setting up the account, the default Alias is the user's username. I typically change that during the setup process to "first.last". But I forgot, and I had to go back and change it later. Now, both aliases show up as email addresses in his E-Mail Addresses tab. I wouldn't THINK that this would make a difference. Any thoughts?