I have a client where we have to restart the DNS service every weekend for a few months. What would cause this? I have removed the forwarders from the configuration to see if that is causing the issue but I don't think it will. Users can't log in during this time. I guess I can have a script to restart the service every week, but would like to find what is causing this. The OS is Server 08 R2. Anyone else had or have this issue?