http://blogs.technet.com/fsmo/archive/2004/06/23/164321.aspxIf you're deploying Active Directory in a branch office environment (one or more central data centers and more than 100 branch offices with domain controllers), make sure to read the updated branch office guide . Version 1.1 has just been posted and containsen-USCommunityServer 2.1 SP1 (Build: 61025.2)