You have a Microsoft 365 tenant.

All users must use the Microsoft Authenticator app for multi-factor authentication (MFA) when accessing Microsoft 365 services.

Some users report that they received an MFA prompt on their Microsoft Authenticator app without initiating a sign-in request.

You need to block the users automatically when they report an MFA request that they did not Initiate.

Solution: From the Azure portal, you configure the Fraud alert settings for multi-factor authentication (MFA).

Does this meet the goal?