Several times over the past couple months the _msdcs, _sites, _tcp, _udp entries on our (DNS) domain controller for our domain become missing. We have only one DNS server. Once this happens users cannot access network resources. If I do a netdisag /fix all the entries are recovered/rebuilt and users can then resume normal operation.
What would cause this to happening?
One friend mentioned checking aging/scavenging. It was enabled to scavenge stale resource records and set to 7 days. Allow Dynamic Update was also set to "only secure updates"
I am disabling the scavenging and changing dynamic update to yes to see if this rectifies the problem or not. Problem is the issue seems to be random.