Navigate to the Outlook Web App (mine was mobile.johnshopkins.edu).
Click the little "settings" gear in the upper right corner and click "Options"
Click the "organize email" tab in the left sidebar.
Now you will be in the "inbox rules" tab - stay there! Click the big PLUS (+) button to make a new inbox rule. My rule was:
- apply to all messages
- redirect the message to
mygmailaccount@gmail.com
- delete the message