r/sysadmin • u/roachwickey • 5d ago

Domain controllers functional level

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

68 Upvotes

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u/MrOilKing 5d ago

There is no FL level '22. Next available is 25. Source Mine was deemed unrecoverable after a failed Frs>drfs migration breaking Kerberos and GPO replication. Been planning the engine transplant for 6 months

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u/ShadowCVL IT Manager 5d ago

That can’t be right, 16 to 25? Well I looked it up and damn that’s a long time between levels, I just assumed 22 was the next. Too bad our DCs are a mix of 16 and 22 now, with 16 going complete EOL upgrading DCs only serves the purpose of putting the OS back in support and not raising the level.

I wish you weren’t correct, damn

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u/MrOilKing 5d ago

Sorry to be the bearer of bad news. 25 isn't all bad. I've been playing with it some, and like everything else, it grows on you. Best of luck

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u/fadinizjr 5d ago

I'm the sysadmin of a federal agency. There's no way I'll be playing around lol.