Sending Email from an Alias - Outlook Web Access To send an email from an alias email address in OWA, follow the following steps. Login to OWA at Outlook.office.com Open a new email message Click on the “Options” menu bar Click the check box "Show From" Select the drop down arrow in the new email message that has your email address, then select an alias to use as your “From” address. Then type and send your message!