Domain funtional level upgrade from 2012 R2 to 2019

Question

Hi

I currently have my domain functional level set at server 2012 R2. All domain controllers already on 2019 but there are some servers (6 to be exact) still on 2012 R2 - upgrade to 2019 in few weeks.

What will the impact be on server still on 2012 if I upgrade domain functional level to 2019?

What will impact be on workstations? (mix between Windows 10 and 11. Maybe 1 or 2 still on windows 7)

Thanks

Answer 1

2016 functional level is currently the highest.

https://learn.microsoft.com/en-us/windows-server/identity/ad-ds/active-directory-functional-levels

What will the impact be on server still on 2012 if I upgrade domain functional level to 2019? What will impact be on workstations? (mix between Windows 10 and 11. Maybe 1 or 2 still on windows 7)

This will not cause you any problems. The document above describes the features added.

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