I have two Domain Controllers in our Active Directory environment. One is on a 192.168.1.x network (Server 2003) and the other is on 192.168.4.x (Server 2008). The former was the first deployed and the latter was installed later. The 1.x traffic routes to the 4.x network, then on to the Internet.
Although both are set to replicate to each other, there have been intermittent problems such as if one goes down for reboot, user accounts will not work, even though the other is there. I get a network not found error when trying to open up existing group policies.
So, to solve this, I would like to only have the 4.x Domain controller and demote the 1.x controller. How do I go about doing this without losing any settings?