Not really, the current method of secure Microsoft “email” via Exchange Online is receiving a message that you have “secure mail”. You then have to click on a l

Not really, the current method of secure Microsoft “email” via Exchange Online is receiving a message that you have “secure mail”. You then have to click on a link to view the message stored on a webserver behind SAML/LDAP auth with a username/password hopefully provided by offline methods. Usually best if behind corp vpn, but that is going away now. Sounds spammy, but this is industry norm from personal experience on Ironport and Exchange. Downside is the spam imitations of this that are likely quite successful at phishing creds from corporate users.