The three security items on the report that have the most impact on the Identity Secure Score are:
A. Enable policy to block legacy authentication: This is an important security measure to prevent older, less secure authentication methods from being used, reducing the risk of unauthorized access to user accounts.
B. Enable user risk policy: This security measure helps to identify high-risk user activities, such as failed login attempts or suspicious IP addresses, and take appropriate action to prevent unauthorized access.
C. Require multi-factor authentication for all users: This security measure adds an extra layer of protection by requiring users to provide additional authentication factors, such as a code sent to their mobile device or a fingerprint scan, in addition to their password.
Therefore, options A, B, and C are the correct answers. Options D and E are also important security measures but have less impact on the Identity Secure Score compared to the other three options.