We currently have an SBS 2008 server and we are going to upgrade it to 4 new Windows 2012 Servers. One for exchange, one Active directory/DNS/DHCP/File server, and two other file servers. What I would like to know is the best way to go about this? We can if we want get all the new servers including exchange up and running on a separate domain and network and then migrate data. I am not sure if this would be the best way though especially with Exchange and Active Directory migrating across domains?