This has been drving me mad for days. I have a Windows 2000 Active Directory. I have a number of DNS servers. One is AD integrated, the other two are secondaries. DNS is set up for dynamic updates and W2K servers and clients and XP clients register fine. The problem is my Windows 2003 servers do not register themselves in DNS. I have checked AD and everythng seems to be fine. I have checked the DNS best pratice guides and configured DNS as per the advice. Any ideas why they won't register?