You have set up a conditional access policy enforcing MFA for all users in your organization for all cloud apps. You now want to verify that users are being prompted with two-factor authentication when logging in to Office 365. Where should you look?

Answer options:

A.From the Azure Active Directory admin center, view the audit logs.
B.From the Azure Identity Governance blade, view Reports.
C.From the Azure Multi-Factor Authentication blade, view Fraud alert.
D.From the Azure Active Directory admin center, view the Sign-ins.

Correct Answer: D 
The sign-ins report provides you with information about the usage of managed applications and user sign-in activities, which includes information about multi-factor authentication (MFA) usage. The MFA data gives you insights into how MFA is working in your organization. 

Option A is incorrect. Azure AAD Audit lets you view information about changes applied to your tenant such as users and group management or updates applied to your tenant’s resources. Sign-in details are not found here.
Option B is incorrect. This report is related to access packages. It enables you to list all the access packages a user can request, and view the access packages that are currently assigned to the user.
Option C is incorrect. The Multi-Factor fraud alert feature lets users report fraudulent attempts to access their resources. It is therefore not the right answer.
Reference: 
To know more about Sign-in logs in Azure AAD, please refer to the link below: 

https://docs.microsoft.com/en-us/azure/active-directory/reports-monitoring/concept-sign-ins