I have a Exchange server running Windows Server Std 2003 SP2 32bit and wanting to migrate to a new server running Windows 2008 64bit with Exchange 2007. What is the best way to do this? Should I upgrade my current server running 2003 to Exchange 2007 then move to a new box or should I just move everything over to the new box?

Hi JackUnfortunately you cannot do an inplace upgrade of Exchange 2003 to Exchange 2007. So bring new server with Win 2008 x64 with Exchange 2007 on it and then migrate the Exchange.Also Refer to :Upgrading to Exchange 2007http://technet.microsoft.com/en-us/library/bb124008(EXCHG.80).aspx &<!---->Transitioning from Exchange 2000/2003 to Exchange Server 2007 (Part 3)http://www.msexchange.org/tutorials/Transitioning-Exchange-2000-2003-Exchange-Server-2007-Part3.html