Are you trying to access your Outlook email on the computer but it is not working? There are various possible causes that can lead to this issue, however, you need to find out which one is responsible for your problem. But before you do anything, try accessing your email from the web browser and see if you can sign in and access your account from there. If the issue persists, then the problem might be with your account credentials. In this case, you are required to verify your email address as well as password and then try again. If you are getting the wrong username or password error, then try to recover your account and then sign up again. In case you can access your Outlook account from the web but the only on the app, then the issue must be with the email setup or configuration settings. Remove your Outlook account and add it again using the correct email credentials and settings.