Deleting PTR records with Upper Case text

I ran into an issue today where I had a DNS PTR record that I needed to delete, but couldn’t. I would delete the record in the GUI without issue, but then I would refresh and the record would reappear.
A little searching and I found that talks about a known issue in Server 2003 DNS and upper case text. I am running Server 2008, so I assumed the issue may still exist and hasn’t been patched.
However, following the instructions in the KB article and using dnscmd failed to delete the record. I didn’t want to try deleting the entire zone (option 2), so I was at a standstill.

A little more searching and I came across, a posting discussing using ADSIEdit.msc to delete the misbehaving record. I deleted the record from AD, but it never cleared from DNS; and after waiting a few minutes, reappeared in AD.
I suddenly had an idea – if the upper case text is causing the problem, maybe ADSIEdit will allow me to edit the text. I copied the dnsRecord attribute from a known good record and overwrote my problem record. A few moments later DNS was updated and reflected the name change. Right-click and delete – the record is gone.

This wasn’t an intuitive solution and I hope I don’t have to perform it again, but at least I now have the necessary steps to repeat if necessary.

2 thoughts on “Deleting PTR records with Upper Case text

  • August 15, 2013 at 7:13 pm

    I tried your method but it didn't work, although it sounded great. Our issue: Old server was all caps at New server under different name uses same IP but now there's a PTR that won't go away that is creating routing confusion.

    Can I just delete the entry for that dead server in ADSI edit?

  • August 15, 2013 at 7:56 pm

    I wound up having to delete ALL DNS entries for anything matching the old hostname and the current IP address, from both domain controllers. Then I had to re-create the proper hostnames via DNS. That worked for me. Thanks for the post – it was very helpful! -R

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