Note:
These steps will need to be completed by an Office 365 Admin.
Instructions
Log into Office 365 using Admin Credentials at http://login.microsoftonline.com
Under Admin click on Exchange on the left hand side
Under recipients click on contacts
Click the down arrow next to the plus sign and click on Mail contact
Fill out the First name, Last name, Display name, Alias, and External email address
Click Save at the bottom
