Occasionally a need arises to send email from an email address in which you have been granted send-as permissions.  These steps will walk you through sending as a delegated email address in Outlook on a Mac. This can only be done if your account has been granted permission to send as the email address from which you want to send.

1. Open Outlook, and compose a new message
2. Select the Address in the From bar
3. In the From drop-down menu, select the email address from which you want to send. If the email address is not listed, select Other email address... and search to Add.