Microsoft 파일 호스팅 및 동기화 서비스입니다.
Hi,
Use the Sign-in Helper tool to access your account:
https://support.microsoft.com/ko-kr/accounts-billing/manage/microsoft-account-sign-in-helper
If it does not help, fill out the recovery form with accurate information, such as name, birth date, old phone number, Skype/Xbox information, or subscriptions. Be noted that it takes time until you receive a response.
When did you last successfully sign in to this account?