Server 2016 domain two way trust with 2003 domain function level

I saw an article where it says that you can establish two way trust between 2003 domain functionality and 2008, 2012, 2012R2 but i cant find anywhere is it possible to do this with Server 2016. The release date is end of September and our domain is due to an upgrade so need to know if it's possible to make a new forest based on 2016 and establish two way trust with 2003 domain functionality?
MRSAsked:
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Scott CSenior EngineerCommented:
Doesn't look like it will.  2003 DFL and FFL have been deprecated in Windows Server 2016.

https://technet.microsoft.com/en-us/windows-server-docs/identity/ad-ds/windows-server-2016-functional-levels

Looks like you will have to install one Windows Server 2008 R2 DC server, remove the 2003 DCs and raise the functional level.

You may want to try this in a lab environment.

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Cliff GaliherCommented:
"The release date is end of September"

Precisely. And in Microsoft's recent move towards more rapid development, some decisions are going to be made literally days before shipping. You really won't get a definitive answer for a product not yet out. Only prerelease info (subject to change) and conjecture. Not good for basing upgrade plans on.
Scott CSenior EngineerCommented:
You would be better upgrading your domain to 2012 R2 or at least 2008 R2 and then to Windows Server 2016.

Your domain isn't due to be upgraded...it is WAY PAST due.  Windows Server 2003 hasn't been supported for over 2 years.

There is no reason to expect Server 2016 will be compatible.

Exchange Server 2003/2007 users are in the same boat.  There is no direct migration path from these legacy systems to Exchange 2016.  It is a two-step migration.  You will most likely have to do the same thing.
MRSAuthor Commented:
I guess we will wait and see. For now i will assume it will not be supported. But i can also test in the lab and make sure it is not indeed. :)
Scott CSenior EngineerCommented:
Glad I could help.
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