With all the speculation out there I'd like to see some specific documentation backing up why I should re-enable IPV6 and/or point to another DNS server first. I have always learned that this is supported and the Microsoft recommended way to do it. We have eight sites and many DCs, I have disabled IPV6 (fully via registry) on all DCs and each Domain Controller points to itself then 2 others. Saw WAY too many 4015 errors so just restarted the service and it went away and the hostname resolved. EVENT ID : 4004 The DNS server was unable to complete directory service enumeration of zone. The extended error debug information (which may be empty) is ''. Check that the Active Directory is functioning properly. I haven't seen this issue affect us negatively until yesterday when a whole site couldn't resolve a URL/hostame served by a conditional forwarder. Event ID : 4015 The DNS server has encountered a critical error from the Active Directory. I'd like to try and demystify what is going on here, or at least get some verbose logging somewhere to find out what the error is referring to. There is a lot of speculation out there like "You should always point to another DNS server first not self, don't disable IPV6, and possibly slow links in VPN/MPLS connected sites". I haven't found any good info on this error and it doesn't tell us anything whatsoever here is Microsoft's very descriptive resolution: om/en-us/l ibrary/cc7 35674(v=ws. The extended error debug information (which may be empty) is "". Check that the Active Directory is functioning properly. Event ID: 4015 Task Category: None Level: Error Keywords: Classic User: N/A Computer: Description: The DNS server has encountered a critical error from the Active Directory. Ever since I started deploying W2012 R2 Domain Controllers I am starting to see a bunch of DNS errors such as these:Įvent ID 4015, DNS-Server-Service: The DNS server has encountered a critical error from the Active Directory.
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