We have a single Exchange 2007 server under a mix of 2003/2008 AD. I know we can bring up Exchange 2010 and coexist with Exchange 2007, but what I want to achieve is a "one shot" deal. I have 48 hours (weekend job) to complete the tasks, already a new server with Windows 2008 R2 x64 with SP1 and all the prerequisites. What I want is to keep the server name, IP address the same... setup the new server and move/attach the databases. Would you please give me some pros and cons, and recommended methods on how it's best and safest ways to do this? Thanks.