Yeah I get the point, I'm saying it's not really a good point, running Windows and Outlook on a secondary system is fine. Forcing the astronauts to learn to use some other system would be a waste of time and probably worse than whatever it is you see as the problem.
FYI Alpine: https://github.com/realpine/alpine Not Alpine Linux, too late to edit to clarify
Most probably it can’t connect to the server without running IT-mandated security software that runs only on Windows
Are you running that on a flight system or on an additional computer where it would be fine to run Windows?
The entire point is to avoid an OS like windows; and an email client like Outlook?
Yeah I get the point, I'm saying it's not really a good point, running Windows and Outlook on a secondary system is fine. Forcing the astronauts to learn to use some other system would be a waste of time and probably worse than whatever it is you see as the problem.