Bit of an odd scenario but wondering if you could shed some light.
Have a single W2K3 server on domain A. The ex-administrator setup a new Windows 2012 Server as a (new) domain controller on domain B; citing some issues setting it up on domain A.
All user accounts and general AD info is on domain A, so this is the preferred domain to persist.
Can I switch the domain membership of the new server back to domain A without much fanfare? A reinstall isn't ideal since there is some unrelated server-side s/w installed on the new server (which was the reason for it being introduced in the first place).