I have clients that are loging into my server through RDP and through RD Web. I have them setup in active directory to login with UPN's ie firstname.lastname@example.org. After the first login the RDC and the RDWeb will prompt them for passwords from the prewindows 2000 name. server\frank.
How do I change it so that RDC and RDWeb will show UPN or no username after first login?
I am using Windows Server 2008 R2