HI
Thanks for posting your issue in windows forum.
"
None of Microsoft's Servers will work for me because of the domain requirements and they have more functions than I require."
I am not sure why we not go ahead windows essentials. I still think windows server essentials w2016(downgrade from wse2019) or windows server 2016 standard(downgrade from w2019) with server essentials role can meet all your needs.
But for your new requirement ,you can refer below documents. I suggest we can try to download and install Linux for testing first in vm then deployment to our environment. we also need to contact Linux support first in their forum. I am sorry I am not Linux
expert ,but I think Linux support will give you best instructions.
Linux Small Business Distros
http://www.linux-magazine.com/Online/Features/Linux-Small-Business-Server-Distros
Zentyal, Linux Small Business Server
https://sourceforge.net/projects/zentyal/
Zentyal 6.0 Linux based Small Business Server Install & base Config
https://www.youtube.com/watch?v=eKQrdsgReKg
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Best Regards
Andy YOU
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