Exam MS-100 topic 1 question 28 discussion

Code to report fraud during initial greeting: When users receive a phone call to perform multi-factor authentication, they normally press # to confirm their sign-in. To report fraud, the user enters a code before pressing #. This code is 0 by default, but you can customize it.

https://learn.microsoft.com/en-us/azure/active-directory/authentication/howto-mfa-mfasettings#fraud-alert you can scroll down to Custom voice message defaults or crtl + f "zero" or "zero pound" to find the relevant information.

A. 0 When a tenant user submits a fraud alert for their account and multi-factor authentication is enabled, the default special code that the user needs to enter when prompted in the alert call is 0 (zero) followed by #. This is a default code used as a way to verify that the user submitting the fraud alert is the actual user of the account. The user will be prompted to enter the code when receiving the alert call and the code will be used to validate the user's identity before unblocking the account.

https://learn.microsoft.com/en-us/azure/active-directory/authentication/howto-mfa-mfasettings#fraud-alert

such a useless question...

Fraud greeting (standard): Thank you for using Microsoft's sign-in verification system. Please press the pound key to finish your verification. If you did not initiate this verification, someone may be trying to access your account. Please press zero pound to submit a fraud alert. This will notify your company's IT team and block further verification attempts.