Windows Server 2012 R2 domain-forest functional level

we are migrating our AD forest. now,we have only server 2008 and 2012 R2 DCs,but we do have 2000 and 2003 member servers. can we still upgrade to 2008 R2 domain-forest functional level first as a first step? once we have all 2012 R2 DCs,we will then upgrade there too.
what are the (security) benefits by running on 2012 R2 domain-forest functional level?
DukewillNukemAsked:
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Mike KlineConnect With a Mentor Commented:
Yes you can still have 2003 member servers, Windows 2000 is no long officially supported so test that first.

You will get features like dynamica access control and there are some pass the hash mitigations in 2012 R2.  I'll send out a presentation on that later.

Thanks

Mike
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