@Bilol_media 

Well, you can operate the 225's in standalone mode, but you won't get the fancy stuff like fast roaming etc etc.  You'll also have to script up a mass configuration script and some more for general monitoring etc.  If those are outdoor 225's then without the controller you won't get mesh support either.

I think you should find a way to ring fence the software controller such that it actually DOES meet their security requirements, because your life will be miserable without it.