Dcpromo Not Necessary for Cloning

Dcpromo.exe is the Microsoft utility that promotes a new Windows Server to run as an Active Directory domain controller. (On Windows Server 2012-2016, the PowerShell cmdlets Install-ADDSForest, Install-ADDSDomain, and Install-ADDSDomainController replace Dcpromo.exe.)

When you prepare the destination computer for cloning AD, it is not necessary to run Dcpromo.

If you run Dcpromo it will attempt to create a new unrelated domain controller.

If you run Dcpromo on an isolated network, you will create an unwanted new domain controller and/or a new forest.

This is not harmful; it will simply take longer to clone AD. U-Move will overwrite the redundant information that Dcpromo created.

On Windows Server 2003, U-Move will reboot the computer to temporarily switch to Directory Services Restore Mode (DSRM) to remove the redundant information.