Hi, im trying to add a new domain controller for my domain, but im getting an error while run the 'adprep /forestprep' command, this is my escenario. DC 1 (Original) Windows Server 2008 R2 Standard DC 2 (New) Windows Server 2008 R2 Enterprise I'm using the Installation CD in the DC 1 Machine, the one that i use to Install the OS on DC 2 Machine.