Active Directory DNS Domain Name Single label names Ace Fekay, MCT, MCTIP EA, MCTS Windows 2008 & Exchange 2007, MCSE & MCSA 2000/2003, MCSA Messaging Originally Compiled 3/2005 — Active Directory DNS Domain Name Single Label Name scenarios are slowly disappearing the more IT admins understand what they are. However, there are installations that are still plagued by this condition, whatever the original cause was, whether lack of research, planning or simply understanding AD’s DNS requirements