Root domain

Displays the fully qualified domain name (FQDN) of the forest root domain that is the current focus of the Active Directory Domains and Trusts snap-in. To change the focus of the snap-in to another forest root domain, type the full Domain Name System (DNS) name of the other forest root domain here.

Save this domain setting for the current console

Specifies whether to save the current domain focus for the given snap-in. If you select this option, the next time that you open the snap-in, it will focus on the domain that is listed here.