Can anyone explain on how to migrate DNS records during the interforest migration. Source domain Windows 2003 abc.xyz.com users are logging in to abc, user login abc\username
Target domain XYZ.com
the FQDN's are different between the source and target domains. example source domain FQDN of the host hostname.abc.xyz.com
They will not be. You will have to remove all hosts from abc.xyz.com and rejoin them to xyz.com. You cannot merge domains in the way that you are suggesting