I have many Windows 2008 R2 RDP connections. I control their login credentials via inheritance across several nested folders. After changing my login password (in my organization's Active Directory) I changed the password in the topmost folder for all these connections. The new password is working in all my Windows 2003 connections and, oddly, a small number of my Win2008 R2 connections. But the vast majority of the Win2008 R2 connections do not pick up the new change.
Windows 2008 R2