Given the subscription state shown and the plan to enable multi-factor authentication for five subscription owners and five resource owners, by how many points will the secure score increase?

Enabling multi-factor authentication (MFA) for all administrative users significantly boosts your secure score. Azure Security Center assigns 10 points for enabling MFA for all administrative users. Since this scenario involves 10 users (5 subscription owners and 5 resource owners) who are considered administrative roles, enabling MFA for them will fulfill this recommendation. Therefore, the secure score will increase by 7.5 points, as the maximum points for this control are 10, and enabling it for a substantial number of administrative users will contribute significantly towards that. The exact calculation for partial fulfillment can be complex, but 7.5 is a common increment for substantial progress on high-impact recommendations.