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I'm new to the company I currently work for and well things are a bit dated. We have Exchange 2003 on our mail server for mail and active directory / group policies. We just received a new(ish) server from corporate and I installed Server 2008 R2 SP2. Its going to be used for WSUS and mail / active directory (we only have 350 active users). We have 280 machines in use and 6 servers 4 running server 2003. Their on 2003 because the program we use for tracking and production is old and there is no update in sight. (I know… I’ll save that can of worms for another day) Anyhow, I was thinking about using Hyper-V and virtualizing WSUS if possible, so it would have Exchange and WSUS on it. Would anyone even recommend that? I was talking to corporate and I was told that the migration from 2003 to 2007 is a bit of a process. I’ve never touched 2007 and from what I see it's changed quite a bit. My main concern isn’t necessarily the installation and set up but the migration of active directory and mailboxes. I have a 10 tera NAS that I was going to back everything up to. Is there a special way to back them up for a migration? Also, when and if correctly migrated how much policy tweaking am I going to need to do? Any help and ideas would be much appreciated.