Outlook.com

  1. While on the Inbox screen, click the profile icon in the top right
  2. Choose the option “Sign Out
 
 

Outlook App

  1. While the app is open, click the profile picture in the top left
  2. Tap the settings Gear
  3. Scroll to the General Section
  4. Tap Accounts
  5. Tap the Account you want to sign out of
  6. Scroll down to “Remove Account