Segue alguns links com informações sobre cloning do AD no Windows Server 2012.

 

1)

http://blogs.technet.com/b/askpfeplat/archive/2012/10/01/virtual-domain-controller-cloning-in-windows-server-2012.aspx

2)

http://blogs.technet.com/b/keithmayer/archive/2012/08/06/safely-cloning-an-active-directory-domain-controller-with-windows-server-2012-step-by-step-ws2012-hyperv-itpro-vmware.aspx#.UbHXFvm1FjY

3)

http://www.youtube.com/watch?v=ki3QxBEWRVU