There’s a reason for this governance and you’re putting your whole team at risk trying to do this yourself

Gotta be an adult to have an adult job

https://medium.com/@michaelis/a-simple-way-to-think-about-itil-accountability-boundaries-and-consistency-97725869796c

Which is why it’s third-party audited every year. It’s transparent for any issues rather than any other solution out there such as OneDrive that obfuscates completely.

https://smallstep.com/docs/tutorials/ssh-certificate-login/

https://sssd.io/

https://bitwarden.com/help/cli/

If you’re concerned about security audits they do those regularly too

https://bitwarden.com/help/is-bitwarden-audited/

In addition to free as in source, they are respected because they have a high-quality, certified, third-party audited product.

HD Base-T does exist but I know what you mean.

The cost of doing business means you should buy a license for each user that needs an account.

https://www.linode.com/community/questions/22605/can-i-set-up-a-smtp-relay-server-on-linode