At the bottom of the Settings window, click on "View all Outlook Settings".
Option "View all Outlook settings"
Click on “Email” and then “Forwarding”.
Menu "Email" > "Forwarding"
Select the option "Enable forwarding" and enter the email address to which you would like to forward messages. If you would like to save a copy of the messages in your institutional mailbox, select the option "Keep a copy of all forwarded messages".