Server 2016 security/users

I just built out first 2016 server for testing.  When I try to make changes to the desktop or folders, I get denied.   I checked the permissions on the Windows folder and couldn't figure out how to add Domain Admins to security.   I'm logged in a domain\Administrator
It only has the Administrators from the local server.  e.g. Test2106/Administrators.

How do you fix this?
J.R. SitmanIT DirectorAsked:
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Cliff GaliherCommented:
2016 hasn't really changed the permission or NTFS model of previous versions. The security enhancements touted are in under the covers hardening. Preventing apps from doing things they shouldn't.

So what *specifically* are you trying to do? Anything a domain admin doesnt have permissions to do probably shouldn't be done.
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J.R. SitmanIT DirectorAuthor Commented:
I noticed it because I was trying to change the desktop Theme.   Domain Admin is not in the security settings.  However, if I log on with my user name it works fine.
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Cliff GaliherCommented:
Through the GUI or are you manipulating files?
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J.R. SitmanIT DirectorAuthor Commented:
I guess I'm not being clear.   When I log on as Administrator, there no security permissions and I can't edit them.  The user Administrator is a member of Domain Users.   If I log on as me, I have security permissions and I can add to the security.  e.g. I can add Domain Admins to the permissions.   I'm also a member of Domain Admins.
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Cliff GaliherCommented:
My point is why are you manipulating those files at all. Changing the theme is done through the GUI, and is a per-user setting at that. So what you describe simply doesnt add up.
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J.R. SitmanIT DirectorAuthor Commented:
you're focusing on the wrong issue.   See the attached.   On a new 2008 R2 server, logged on as Administrator the "add" button is available.  On the 2016 server it is not.

permissions
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Cliff GaliherCommented:
*sigh* never mind. You are choosing nit to read or understand. Good luck. "m out.
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MaheshArchitectCommented:
This is not windows server 2016 issue, NTFS permission model is not changed

2016 server We are using 2016 DC and member server both and I did not face this issue ever

You can try one thing:
Add server to domain 1st if you want to domain admins on ACL
If its already done, open lusrmgr.msc on server and from administrators group try to add domain admins, if domain admins is not already added
You must be having some issue with either installation or there must be some issue with domain joining, you may try disabling UAC from gpedit.msc

probably the account through which you trying to add permissions is not member of local administrators group on server, in that case its highly possible that "add" button is grade out
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J.R. SitmanIT DirectorAuthor Commented:
you were correct.   The user I was logging on as was not part of the Domain Admins group.   Somehow the group got removed from the account.  

Thanks
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Windows Server 2016

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