Hi All,
This is a new and only Exchange 2010 std install on a 2008R2 server. The existing Active Directory is running on a 2003 server. I added a 2008 DC to the network and all replication and functions are working OK, except:
User accounts originally created on the 2003 server cannot access OWA. We login with domain\username and receive The user name or password you entered isn't correct. Try entering it again.
Any new accounts (mailbox) created on the Exchange 2010 work fine. Any Administrator accounts work fine. Local Outlook Client 2010 works fine for everyone.
I checked IIS authentication and it looks good. I added the "everyone" account to the OWA folder, no joy.
Any help would be greatly appreciated!