I have Server 2003 Standard SP2, Exchange 2003, and Office 2003 for RDP users.
The client is a Vet and they use Cornerstone. They have 5 stations that connect straight to the program, (thick stations), and 5 stations that connect to the program via RDP, (thin stations). I have setup many different email configurations from Exchange to POP, to IMAP, and can email successfully out of Cornerstone on all of the "thick stations" but get a "cannot logon error" on all of the "thin stations" (Remote Desktop Users)...I am able to send and receive email from Outlook and Outlook Express on all stations...
Could this be a Terminal Server problem?