Verifying What Version of AD Our DC is Using

Hello All,

I'd like to verify what my Active Directory version on my Windows 2012 R2 DC is.  I have another employee here telling me that it is using 2003 version and needs to be upgraded to 2012.  I'm not sure what they mean.  I checked the schema version and it is 69 (Windows 2012 R2).   As far as I know that is the version of AD.

Is there anything else I could be missing?
Michael LainezAsked:
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Cliff GaliherCommented:
He is probably talking about the domain (and/or forest) functional level. Which is not dictated by the schema level. It defines what features are actually lit up in the various AD APIs.
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Michael LainezAuthor Commented:
Ah OK.  Is there a way for me to verify what the domain functional level is?
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Cliff GaliherCommented:
Right click on the domain in ADUC, choose "Properties"

The general tab lists them.
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Michael LainezAuthor Commented:
Thanks!
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arnoldCommented:
[if you have a DC that is running Windows 2003, 2003 is likely the domain, forest level you must operate in.
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Cliff GaliherCommented:
With 2003 several years past end of life, I hope there isn't still a DC runninf that OS. I don't recommend that OS running anywhere, but a DC is particularly bad and should be replaced IMMEDIATELY.
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Shaun VermaakTechnical SpecialistCommented:
Via PowerShell
Get-ADObject (Get-ADRootDSE).schemaNamingContext -Property objectVersion

Open in new window

87 = Windows Server 2016
69 = Windows Server 2012 R2
56 = Windows Server 2012
47 = Windows Server 2008 R2
44 = Windows Server 2008
31 = Windows Server 2003 R2
30 = Windows Server 2003
13 = Windows 2000
https://blogs.technet.microsoft.com/poshchap/2014/03/07/one-liner-active-directory-schema-version/
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