Register the key pair that will be used with Microsoft Outlook on Windows.

1. Double-click the downloaded key pair file.
   
2. Select the save location and then click "Next."
   
3. Select the file to import and then click "Next."
   
4. Enter the key pair passphrase into the "Password" field and then click "Next."
   
5. Select the certificate store and then click "Next."
   
6. Check for any errors and then click "Finish."
   
7. Click "OK."
   
8. Start Outlook and then click "Sign in."
   
9. Enter your ID and then click "Next."
   
   The following steps describe the procedure for using password authentication and device certificate authentication in Microsoft Outlook.
10. First, log in using your password. Enter your ID and then click "Next."
    

11. Enter your password and then click "Next."

    [ Reference ]

    If you log in using a temporary password, you need to change your password.

    

12. Click "Yes."