Step 1 - Find the Outlook App on your Phone and open it



Step 2 - click on the circle on the top left corner of the app.





Step 3 - Click on the cog wheel at the bottomĀ 





Step 4 - Click on your account




Step 5 - Click "Delete Account" at the bottom




Step 6 - Select "Delete"



Your email is now removed from the Outlook App, you can now follow this guide to re-add your account.