MDC/Encryption?

I pay a third-party to have an add-on in Outlook that allows users to encrypt their emails when sending PII - this effectively moves the email thread to a browser session.

I have briefly reviewed the LetsEncrypt module in the manual and just don't see anything that could replace this third-party module.

Is there an option I could offer the Outlook users within MD to do this? If not, is this on the dev roadmap?

Thanks!

Jim