At last Microsoft have released an official method to maange Exchange 2003 from Windows Vista. No more copying DLLs around and generally hoping for the best.
http://www.microsoft.com/downloads/details.aspx?FamilyID=3403d74e-8942-421b-8738-b3664559e46f&DisplayLang=en
Although using Terminal Services to connect to the Exchange server is still the best way to do it, and is what I continue to do.
Exchange 2003, MS Exchange Server
Exchange 2003, MS Exchange Server