@baph0m3t
We have couple of articles that talk about how to use windows and freeradius server for cnMaestro authentication.
Here are some of them:-
https://community.cambiumnetworks.com/t5/cnMaestro/Integrating-Windows-Active-Directory-with-cnMaestro/m-p/84164
http://community.cambiumnetworks.com/t5/cnMaestro/How-to-Integrate-a-RADIUS-server-with-cnMaestro/m-p/86428#M78
If you need additional information, please do let us know.