OWA 2003 not working after upgrade this weekend
Posted on 2009-02-18
I upgraded my Exchange server to 2003 enterprise this weekend and almost everything is working great.
I was running Exchange 2000 on a 2000 SBS server. The new Exchange server 2003 Ent. is running on a 2003 server that is also a DC in the domain. The 2000 server and Exchange 2000 are still active in the domain.
If I try OWA inside my network to a mailbox on the new server I have to authenticate 2 times but it works. Outside the network after the username and password is entered I get a message that there may be a DNS error and the new server can't be found.
Internally and externally if the mailbox exists on the old 2000 server everythign still works fine.
I want to get this working without FBA, SSL or installing a Frontend server. Is this possible and what is wrong?