I just installed a Windows 2008 R2 domain controller in a subnet that has a Windows 2003 R2 domain controller in it. The domain controller has been in place now for over a month and I have not seen any problems with it. However, I would like to know if there is a way to control what server the workstations use as their logon server. Currently they seem to just randomly choose one or the other when I check the "LOGONSERVER" field when running the 'set' command at a command prompt. I would like to get them all using the new server as we are eventually going to get rid of the old server. Please let me know if you need any additional information from me on this to help.