Can use Outlook on my s21 When sign in it momentarily the Password . . . - Next, go down and tap on "Clear credentials " - Tap on "OK" to confirm - Enter your current PIN number and tap on "Next " - The message "Credential storage are now cleared" will appear Please note that you may need to sign back in to all your applications I hope this helps Do let me know if you require further assistance Best Regards, Adesoji