In order to remove a User from your Organization, first, navigate to the Settings-->Administration --> User section.

  1. Select the User that is getting removed.
  2. Click Remove User button.
  3. Confirmation dialog is displayed:
  4. Clicking Yes, removes the user from the tenant and returns to the list of users.
    •  A confirmation message is displayed in green. 
  5. Clicking No will just return you back to the list of users without anything happening.