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John Daly

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Duplicate DNS servers appear in DNS console after creating Active Directory

I'm building a standalone server for a small network, only one server, 2012 r2. Once I finish following the AD creation and server promotion wizards, and a DNS server is created as part of the process, I later discover within the DNS mgmt console two DNS servers listed. One is named with just the server name, and the other is the fully qualified server name with complete domain suffix.

I have uninstalled AD and demoted the domain controller and then recreated the domain, etc several times during some bench testing of this new domain, but all has gone very well with no glitches, etc that I have noticed.  Also, the last time this problem occurred, it seems that the second entry wasn't apparent immediately following the domain / dns creation, but when I revisited the server the following day the second server was now listed.  

I'm stumped, any help appreciated.
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John Daly


Thanks for quick reply...

Well well well., I had no idea. Hadn't seen it before in 2008 r2 and earlier OS's. Something new in 2012?
Appreciate the confirmation. Of course if I had to make a manual entry, which one would I put the entry into then??
They are logically identical, so it doesn't matter where you put it.
Well sounds good (and reassuring) to me then. I tested, and anything added or deleted from one is reflected in the other.  just out of curiosity though, I hadn't see this previously. Has this characteristic recently appeared in 2012, or been around? Not even sure why it exits unless AD integration requires it. Any comments appreciated, but I think you get the prize!