NewOutlook · Exchange Online
Outlook: S/MIME support for Shared Mailboxes and Delegate Mailboxes in New Outlook for Windows
New Outlook for Windows will gain S/MIME cryptographic capabilities (sign, encrypt, decrypt) for shared mailboxes and delegate mailboxes, extending existing primary mailbox functionality to secondary mailbox access patterns.
Key dates
- — preview (Feature currently in development; general availability date not yet announced)
Microsoft's description
New Outlook for Windows will extend S/MIME support to shared mailboxes and delegate mailboxes associated with a user's primary account. Users will be able to sign, encrypt, decrypt, and reply to S/MIME-protected messages while working from shared and delegated mailboxes. #newoutlookforwindows