Remote Desktop Connection 6.0 client helps you use the new Terminal Services features. These features are introduced in Windows Vista and in the Microsoft Windows Server Code Name “Longhorn" operating system from a computer that is either running Microsoft Windows Server 2003 with Service Pack 1 (SP1) or Microsoft Windows XP with Service Pack 2 (SP2).
The Remote Desktop Connection 6.0 client can be used to connect to legacy terminal servers or to remote desktops as before, but the new features that are mentioned in this article are available only when the remote computer is running Windows Vista or Windows Server Code Name "Longhorn."
Here are existing new features:
a. Network Level Authentication
b. Server authentication
c. Resource redirection
d. TS Gateway servers
e. Terminal Services Remote Programs
f. Monitor spanning
g. Visual improvements
Please refer to the article to get its download location and more detailed information: http://support.microsoft.com/kb/925876/en-us