Migration to R2 domain - advice needed please
We currently have a Server 2008 domain. We have a server providing AD and DNS services, with a second server replicating these roles.
Over the years our domain controller has been upgraded from previous versions of Windows Server (not by me) and we are now left with this 2008 machine with a legacy AD / group policy set up which does not suit the current design of our network. We have also found that our secondary server seems to take over on the network, and does not properly replicate group policy settings anymore (for example, the domain controller has new group policy proxy settings to push to clients, when the secondary server is online it becomes the logon server and pushes out old proxy settings refusing to replicate the new settings...odd).
My plan is to build a new Server 2008 R2 domain controller, and re-do our group policy to fit the needs of the school from the ground up. My question is, is there a way to migrate user accounts from the old 2008 machine to the new 2008 R2 machine? We do not want any of the old groups / group policy stuff, just the user accounts to save on re-making them. Can anyone offer advice on if there is a way to do this, or if we are better off just recreating user accounts etc.
As a side issue, we also run Citrix XenApp 5.5 which is running on 4 other Server 2008 machines. I understand that 5.5 does NOT run on R2. Seeing as these Citrix servers are just standard / member servers, there shouldn't be any problems leaving these as 2008 machines in the 2008 R2 domain, correct?