Unable to activate Windows Server 2012 against KMS, error code 0x80072EE2

In our environment, we have full implementation of KMS host with the new Windows 8 and Windows Server 2012 keys, (I would write about how run this upgrade later).  Somehow, when we tried to activated a deployed Windows Server 2012, we got the following error log: event ID 8200 and 1014 with error code 0x80072EE2.8200


Verified that the firewall port 1688 and DNS records are all fine in where this server is located, and through a few research, I found this thread in TechNet, although the discussion was in 2009, it seems still applicable.


I got the new client setup key from here:

then ran the following commands:

slmgr /ipk XC9B7-NBPP2-83J2H-RHMBY-92BT4
slmgr /ato
Voilà!  The Windows Server 2012 is activated!

I guess the root cause could be someone tried to activate this server incorrectly before we started working on it, or that was not from a volume license copy.  I would give credit to cybercoaster in Microsoft forum.  Thanks,

Another link might be useful: