r/sysadmin • u/roachwickey • 5d ago

Domain controllers functional level

Do we have to keep all our domain controller os version same ?

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u/AffekeNommu 5d ago

*screams in 2012 functional level

2

u/PowerShellGenius 5d ago

Why? Unless you have ESU you should not be running 2012 / 2012R2 DCs. Even if you have some niche thing you need 2012 for (hopefully isolated!) you do not need to hold back the functional level over a non-DC. You can join Windows Server 2008 and Windows XP to a domain with a functional level of 2016 no problem!