You have an Azure AD tenant that contains a user named User1 and the conditional...

According to Microsoft Entra Conditional Access documentation and the SC-300 study guide, the What If tool in Azure AD is specifically designed to simulate Conditional Access policy results for a given user scenario. It allows administrators to input details such as user identity, location (IP address), device state, and application to determine which Conditional Access policies would apply before actual enforcement.

From Microsoft documentation:

“The What If tool allows admins to simulate a sign-in event for a specific user and evaluate which Conditional Access policies will be applied or excluded.”

Other options do not serve this function:

Access Reviews: Used for periodic access validation, not policy simulation.

Identity Secure Score: Provides improvement recommendations, not policy evaluation.

Microsoft 365 network connectivity test tool: Tests network connectivity, not policy application.