The answer might be as simple as "yes, just build the exchange server", but I wanted to make sure that if I build a new box on the x64 platform (hardware/Server 2003 x64), that I will have no issue getting 2003 working on the platform. As I understand it, 2007 is only going to run on x64 so I was hoping to prep myself now for its release. On a side note, any blog or info on upgrading the exchange 2003 on a 32 bit to a exhcange 2007 64 bit? Much appreciated.