To open Outlook Settings, you have to click the Settings ‘Wheel’ icon in the top ... says Add an Action, choose Forward To under Route, then enter the Gmail email address.

Configure Outlook on the web (at Outlook.com) to automatically forward emails you receive to a different email address. Select the Settings gear icon in the Outlook on the web toolbar. Select View ...

There are times when you might want to automatically forward email that's arriving in Outlook to another account. If you're going on vacation, for example, it can be convenient to auto-forward ...