We are running windows server 2003 AD on our domain with three Domain controllers, one system has exchange server 2007(which is going away, moving offsite). One has dns on it, the other is just domain controller. Lately our dns server has been having issues and throwing our server and client network connections, etc.. off. I'm looking to setup a second dns server so that if one of them has issues the other dns server will allow the network to function correctly(redundancy)? I'm not sure what the issue is yet, but the computers are unable to find servers, login's don't work, etc.. I restart the server and things are fine. Looking for information on how to do this.