Can’t complete secondary authentication for an unusual logon?

To strengthen account logon security, the mailbox team has implemented security hardening for account logons.

If you log on from an unusual location or enter an incorrect logon password too many times, a secondary authentication window appears after you enter your username and password. Complete secondary authentication to log on normally. During SMS validation, if your mobile phone number is incorrect—for example, if the attached mobile phone number has expired and you have not updated it—you can update your mobile phone number by following the steps in https://help.aliyun.com/document_detail/464811.html.