I'm at a point where I used Thunderbird and Enigmail on a Ubuntu 18.04 workstation to set up encrypted email for all my user accounts that were email only in my Virtual Servers. I have that working correctly. I also got things mirrored onto my laptop. I also did a mirror on my Android mobile device using K-9 Mail and OpenKeychain as the key manager.
I'm poking around Usermin trying to find the place where I can give admin accounts their private OpenPGP keys, but I see nothing that looks promising.
Is there a manual here at Virtualmin dot com for setting that up?