The latest version of the Remote Desktop Connection software from Microsoft supports Windows Vista. There are a few different features with it that my be causing you some frustration. A good place to start is at the Terminal Services Team Blog. They have a Vista Remote Desktop Connection Authentication FAQ that answers some useful questions about the new authentication features.
There has been a lot of feedback about the new authentication features introduced in the latest version of the Remote Desktop Connection client. These features are part of our efforts to improve security for Terminal Services (TS) in Windows Vista and Windows Server code name â€œLonghornâ€ , however some users have run into a variety of problems that have caused frustration. In order to alleviate some of the frustrations, below is an FAQ on various symptoms users have run into, along with solutions and workarounds.