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I have opened up a support case with Microsoft on August 17th. So far they've enabled all auditing and logging functions and the problem happened again - it was not shown at all what deleted the DNS record even with maximum logging turned on.Tomorrow they want me to wipe out the entire DNS zone and start over from scratch :(I wonder if our problems are the same and due to some bug in 2012 R2 DNS and/or DHCP.Technet says something about setting option 81 but I don't even have an option 81. I assume this is set, but on the client network adapter under your ipv4 or 6 properties and then advanced, under the dns tab you have the option "Register this connections address in DNS" checked correct? We are experiencing the same thing in our environment. It seems to occur once every couple of days and only on our 2012 R2 DC not on the other 2003 DCs in the forest.On the server that has a 'missing' DNS record - if I do ipconfig /registerdns - then it is put back in. Obviously that only band-aids that one server and doesn't fix the root problem.
This means that any authenticated user or computer can create a new object in the zone.
This is because the client will not update itself due to the current record in DNS is beyond the lease period.
This happens even though DHCP registered the record.
If there is a problem with PTRs getting updated even after configuring credentials, please see this article: DHCP server processes expired PTR resource records in Windows Server 2003 . The use of Name Protection in the Windows Server® 2008 R2 operating system prevents name squatting by non-Windows-based computers.
Name squatting does not present a problem on a homogeneous Windows network where Active Directory® Domain Services (AD DS) can be used to reserve a name for a single user or computer.” DHCP Step-by-Step Guide: Demonstrate DHCP Name Protection“Name squatting occurs when a non-Windows-based computer registers in Domain Name System (DNS) with a name that is already registered to a computer running a Windows® operating system.