

Ubuntu Server supports Windows Active Directory. I haven’t used it for anything but authentication (and authentication works flawlessly) and some basic directory/share permissions but theoretically it should support group policy too.
It’d be cool if there was a mainstream FOSS alternative though (there might be, I’ve done literally 0 research), but this works okay-ish in the meantime.
But for management of the actual production servers at work I use a combination of ManageEngine (super great and reasonably priced) and Microsoft’s Entra (doesn’t work well, don’t do it)
I went to one in Chicago and had some of the best wings I’ve ever had in my life, still to this day.
Went to another one in my home town a few years later, and had terrible, obviously frozen wings.
Never went back again. Not sure if that answers your question.