Sending email as alias in office365?

Brent Waldrop After bashing my head against the wall for a few hours and reading several documents that were absolutely no help whatsoever, I finally stumbled across I way to send external emails from a Shared Mailbox using OWA. I didn't expect it to work with aliases, but I tried it anyway, and it does not work.

To Send As a shared mailbox, open up the shared mailbox in a separate window after logging in to your primary email (make sure you have both Manage and Send permissions for the mailbox) using this URL: https://outlook.office.com/mail/sharedmailbox@mydomain.com/inbox

Replace sharedmailbox with the primary email of the shared mailbox. Replace mydomain.com with the domain. From here when you create a message it will show the shared mailbox by default in the From address and when you send messages externally they will in fact come from the shared mailbox email address.

Not a perfect solution by any means, but at least it works.