個人用のメール、予定表、連絡先管理に New Outlook on Windows を使用する
Hi! Sorry to hear that you have troubles with this situation, to fix it, you need to go to this ling so you can add a new contact method and try to delete the old one:
https://account.live.com/proofs/manage
However, to access this link, you need to verify the account, so try by clicking the use a different verification method option and see if you have any other enabled, otherwise you will need to fill out a recovery form: