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Jose Thorne

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Where should the first 2016 DC be introduced the Forest domain or the child domain?

I am preparing for an AD upgrade from 2008 R2 to 2016.  I have an "empty" Forest root domain with only 2 DCs and nothing else.  The child Domain has 10 DCs.
Where should the first 2016 DC be introduced the Forest domain or the child domain?  Or, does it not matter.
Thanks.
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Jose Thorne

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Todd,
We do have Exchange 2010, but have moved on to gmail, so no one is using Exchange.  We plan to have it decommissioned before the AD upgrade starts.   But that brings up a new question - What does happen to Exchange 2010 if you upgrade to AD 2016? Does it simply break Exchange (like no one can login to mailboxes, etc), or does it have other more serious consequences.  
In other words, in my case, since no one is using Exchange, (but we still have it up because management is scared to turn it off) will it effect the upgrade to 2016?
Agree with Todd, There is no 2016 DC support for Exchange 2010.Please check this for more details.
https://technet.microsoft.com/en-us/library/ff728623%28v=exchg.150%29.aspx?f=255&MSPPError=-2147217396


@Todd,
Thanks for pointing the missed point.
According to exchange supportability matrix, 2016 dc servers are supported with exchange 2010 sp3 ru5 and above
https://technet.microsoft.com/library/ff728623(v=exchg.150).aspx
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As commented by Todd it is not supported. Either uninstall Exchange 2010 or upgrade Exchange2010 to Exchange2013SP1 or Exchange2016 before promoting 2016 server to a DC. Here is a similar thread.
https://social.technet.microsoft.com/Forums/en-US/c6b79674-d319-468e-9f5a-ede4c733633a/compatiblity-with-server-2016-dcs-ad?forum=exchange2010
You are right,
I over looked article
Its my bad
Ok thanks for all the Exchange 2010 comments.  We will surely uninstall Exchange 2010 before proceeding with the AD 2016 upgrade.
Thanks again.
Glad to know our comments helped.
Wish you good luck. :))

MAS
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