Procedimento para consultar o FFL (Forest Functional Level - Nível Funcional da Floresta) e o DFL (Domain Functional Level - Nível Funcional do Domínio), através do snap-in "Active Directory Domains and Trusts":

> Run > Domain.msc

Preview - http://blogs.technet.com/cfs-filesystemfile.ashx/__key/communityserver-blogs-components-weblogfiles/00-00-00-95-87/3034.Display_5F00_FFL_5F00_DFL.png