We're eager to see the new Outlook for Mac client adopt S/MIME support!
Support for S/MIME with Oauth accounts would be a game changer for us!
Brian Hibbert commented
To me S/MIME support is table stakes. Will need to use OWA or Outlook for iPAD for those emails until the Mac client has this feature.
Reed Dier commented
I have been trialing the "new" Outlook for Mac, and while S/MIME works properly with an IMAP account, it however does NOT work with an OAuth account type.
This is a HUGE issue for my organization, as Google is about to prevent IMAP signins for GSuite accounts starting with new users in June of 2020, and all existing users by February 2021.
This means that if there is no resolution to be able to use S/MIME with an OAuth account type, I will be forced to a new mail client.
Ta Kung commented
Encrypted e-mails generates an AADSTS90072 error on the recieving Outlook. Old Outlook for Mac did not.
Thomas Reimann commented
When trying to read an encrypted mail I only see the smime.p7m attachmend, not the content. double clicking that brings up keychain with the error "unable to import an item. The content on this item cannot be retrived."
Switching back to old design, everything works well again.