i am seeing some strange DNS isssues. We have two AD integrated DNS Windows 2008 R2 servers and a non-AD DNS. The Non-DNS is used for non AD and non truseted systems. It does however copy the information from the AD DNS servers. Just doesn twrite to them. Once a week a get servers loosing thier DNS registeration and I ahve to go into the server by ip and run an ipconfig /registerdns before it shows up again. Any thoughts?