We have exchange 2003 in our environment. we have a parent domain and 3 child domains. The the childs have exchange 2003. Since SP1 is out how do we prepare our Forest/domains for exchange 2010 SP1. Talking about the setup/prepapreschema, prepareAD, preparedomain. Should run from Exchange 2010 RTM or can run these command lines from the Exchange2010-SP1-x64.exe. Also is this the right process for the commands.