Activate Windows 10 Enterprise 2016 LTSB with KMS

Problem

Can't activate Win 10 Ent LTSB 2016 on Win2012R2 KMS server

Solution

We had to add the Windows Server 2016 KMS Host Key to the Win Server2012R2 KMS Server.
Make sure KB3172614 and KB3058168.


Grab the Windows Server 2016 KMS Host Key from VLSC.
Next add the key to the Win2012R2 KMS Server, and activate

run:
slmgr -ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX (Win2016KMS Host Key)


Activate
slmgr -ato


Then verify to see if the Win2016KMS Host Key is installed and activated.
slmgr -dlv


After this I was able to activate Windows 10 Ent LTSB 2016
Hopefully this will work for you.



Source: https://social.technet.microsoft.com/Forums/en-US/6b05ee31-e6b5-4658-86d1-3015d4ecf79e/mastering-windows-10-enterprise-2016-ltsb-workgroup-kms-activation-issue?forum=win10itprosetup