1. Sign into your Gmail account and click .
2. Click the tab, then click .
3. Enter your Outlook.com email address, then click . Confirm the address by clicking .
4. Keep that Gmail tab or window open. In another tab or window, open your Outlook.com account and look for an email from Gmail with a verification code.
5. Back in the Gmail tab, type or paste that code into the "confirmation code" field, then click Verify.