Custom Application Directory partitions are a method of dividing DNS servers for replication. It allows replication to occur between specified domain controllers. This how-to video was made on Microsoft Windows Server 2008 but could be done on 2003. We install DNS (Domain name service) so many time with active directory that we forget it is a fully featured service on its own. This video uses the command line. The commands that I use are…

dnscmd server1.first.domain /createdirectorypartition imaginary.first.domain
dnscmd server1.first.domain /enlistdirectorypartition imaginary.first.domain