사용자가 구독, 계정 설정 및 청구 정보를 관리하는 데 도움이 되는 Microsoft 365 기능입니다.
Good day, thanks for your question. I am glad to be able to provide assistance to you today. Please check the key points via the below as “ There are a number of possible explanations for why verification codes don't always arrive. Read through the list of the most common causes, and see if any of them apply to you, or use the troubleshooter to help guide you.”
https://support.microsoft.com/ko-kr/account-bil...
Regards,
Paul R.