What Is Secure Score? Security Definition

Imagine you are the manager of a large apartment building. Your job is to make sure every apartment is safe. You check things like whether the front door locks automatically, if there are smoke detectors in every unit, and if the security cameras are working. You make a checklist of all the safety features you want to have. Then you walk through the building and see how many of those features are actually in place. You give your building a safety score out of 100. The closer you get to 100, the safer your building is.

Secure Score works the same way but for your company’s Microsoft 365 online services like email, Teams, and file storage. Microsoft gives you a checklist of security actions you can take. These actions include things like turning on multi-factor authentication, keeping software updated, and stopping old login methods. Secure Score measures how many of those actions your company has completed. It gives you a score out of 100. A score of 100 means you have done everything Microsoft recommends to be secure.

Your Secure Score goes up when you take recommended security actions. It goes down if you turn off a security feature or if Microsoft adds new recommendations. The goal is to always improve your score, but experts say 100% is very hard to reach because new recommendations keep coming. Instead, you should focus on the most important actions that protect your highest-risk data first. Secure Score helps you see exactly where you are weak so you can fix the biggest problems first.

Secure Score also lets you compare your score to other companies of similar size. This helps you know if you are doing better or worse than average. It is like knowing that your building’s safety score is higher than most other buildings in your city. That gives you confidence that your building is well protected.

Secure Score is a security analytics service within the Microsoft 365 Defender portal. It quantifies an organization’s security posture based on system configuration, user behavior, and security feature adoption. The score is calculated using data collected from various Microsoft 365 workloads including Exchange Online, SharePoint Online, Microsoft Teams, Azure Active Directory (now Entra ID), and Microsoft Intune. Each security action, which Microsoft calls an improvement action, is assigned a point value. The total possible points change over time as Microsoft updates its security recommendations based on the threat landscape.

Secure Score works by evaluating the configuration of your Microsoft 365 tenant. It checks whether specific security controls are enabled or disabled. For example, one improvement action might be “Enable multi-factor authentication for all users.” If you have MFA enabled for all users, you earn the points for that action. If you have it enabled for only some users, you earn partial points. The score is presented as a percentage of total possible points. The service also tracks your score over time so you can see trends.

There are two main views: the basic Secure Score and the Secure Score for Identity. The basic Secure Score covers all Microsoft 365 security configuration. Secure Score for Identity is part of Microsoft Defender for Identity and focuses on identity-related risk factors. Both scores appear in the Microsoft 365 Defender portal under the “Secure Score” section. Improvement actions are categorized by priority: Critical, High, Medium, and Low. Each action includes a status indicator showing whether it is completed, partially completed, or not started.

Secure Score does not measure the absolute security of your environment. It measures how well you have implemented Microsoft’s recommended security configurations. A high score does not guarantee you are safe from all threats, but it strongly correlates with a lower risk of compromise. Microsoft uses telemetry from millions of tenants to validate that higher Secure Scores result in fewer security incidents. The scoring model is continuously refined. Actions that were once considered optional may become required as threats evolve.

Secure Score also supports third-party integrations through Microsoft Graph API. Organizations can export their Secure Score data for custom reporting. IT professionals can use PowerShell to retrieve score details and track improvement actions programmatically. This allows large enterprises to automate security posture reporting across multiple tenants. The tool is available to any Microsoft 365 customer with a subscription that includes Exchange Online, SharePoint Online, or Microsoft Teams. Premium features like Secure Score for Identity require additional licenses such as Microsoft 365 E5 or Microsoft Defender for Identity licenses.

Secure Score matters because it gives IT teams a single, measurable number to track their security progress. Without Secure Score, it is hard to know if you are doing enough or where you should focus next. Security is complex, with hundreds of possible configurations across email, identity, devices, and apps. Secure Score cuts through that complexity by prioritizing the actions that have the biggest impact. It tells you exactly what to fix first.

For example, if you have a score of 40, Secure Score will show you that enabling multi-factor authentication for all users would add 10 points. That is a clear, actionable step. You can then track whether your score goes up after you enable MFA. This makes security improvements tangible. You can show your boss or your board that your security posture is improving over time. You can set goals like “reach a Secure Score of 80 by the end of the quarter.”

Secure Score also helps you justify security spending. If a new security tool costs money but Secure Score shows it would add 15 points, you can use that data to make the business case. It provides a common language between IT, security teams, and management. Everyone can understand “we need to increase our score from 60 to 75.”

Secure Score helps with compliance. Many regulatory frameworks like NIST or ISO 27001 require organizations to have certain security controls in place. Secure Score’s improvement actions often align with those controls. By following Secure Score recommendations, you naturally move toward compliance. Microsoft also uses Secure Score data to inform customers about new threats. If a new attack vector emerges, Microsoft may add a new improvement action. That immediately tells you what to do to protect against that threat.

Finally, Secure Score reduces the chance of a costly data breach. Microsoft has published research showing that organizations with higher Secure Scores experience fewer security incidents. While no tool can guarantee 100% safety, Secure Score is a proven way to reduce risk. For IT professionals, it is an essential part of their daily security management routine.

Secure Score questions appear in several patterns across certification exams. The most common pattern is the scenario-based question. Here is an example: “Your organization has a Microsoft 365 tenant. The security team reports that the Secure Score is currently 45. You need to raise the score to at least 70 within the next month. Which action should you take first?” The correct answer is usually to enable multi-factor authentication for all users because that improvement action carries the highest point value. Wrong answers might include implementing a Conditional Access policy that applies only to admins or enabling mailbox auditing. These are good actions but do not raise the score as much or as quickly.

Another pattern is configuration questions. For example: “You need to view the improvement actions that will provide the highest point increase. Where should you look?” The answer is the Secure Score page in the Microsoft 365 Defender portal. A distractor might be the Microsoft 365 admin center or the Azure Active Directory blade. You need to know the exact location. Similarly, questions may ask how to export Secure Score data. The correct method is using the Microsoft Graph API or the Get-MpScores PowerShell cmdlet. They might ask which license is required for Secure Score for Identity. The answer is Microsoft 365 E5 or a standalone Microsoft Defender for Identity license.

Troubleshooting questions also appear. Example: “A user reports that the Secure Score has dropped by 5 points overnight. What could be the cause?” The correct answer could be that a security feature was disabled, a new improvement action was added by Microsoft, or a user group was removed from a policy. You need to know that the score is dynamic and changes with configuration changes and new recommendations. Wrong answers might blame user behavior or hardware issues, which do not directly affect the score.

There are also comparison questions. “Your organization’s Secure Score is 80. The average for organizations of your size is 75. What does this indicate?” The correct interpretation is that your security posture is above average, but you should still look for high-impact improvement actions. A distractor might claim that a score of 80 means you are completely secure, which is false. Another pattern: “You have a Secure Score of 85. A new improvement action is added that is worth 10 points. Your score now drops to 77. Why?” Because the total possible points increased, so your percentage decreased even though your configuration did not change.

Finally, questions may test your understanding of what Secure Score does NOT measure. For example: “Does Secure Score measure the number of phishing attacks your organization has received?” The answer is no. Secure Score measures configuration, not threat detection or incident volume. They might ask: “Can Secure Score guarantee your organization will not be breached?” The correct answer is no. It is a measure of your security posture, not an absolute defense. Being aware of these limitations is critical for exam success.

Secure Score is more than just a number; it is a practical tool for daily security management. As an IT professional, you should integrate Secure Score into your regular workflow. Start by configuring Secure Score as a default tab in your Microsoft 365 Defender portal. Assign someone on your team to be the Secure Score owner. This person monitors the score, reviews new improvement actions, and coordinates implementation with other teams.

One of the most valuable features is the ability to compare your score against organizations of similar size and industry. This benchmarking helps you set realistic targets. If the average for your industry is 70 and you are at 55, you know you have significant room for improvement. You can use this data to justify budget requests for security tools or additional training.

When implementing improvement actions, do not try to do everything at once. That can overwhelm your users and disrupt operations. Instead, use the priority categories. Start with Critical and High actions. For example, if 'Disable legacy authentication' is listed as Critical, prioritize that over a Medium action like 'Enable mailbox audit logging'. Legacy authentication is a known attack vector that attackers exploit daily. Closing it immediately reduces your risk substantially.

Be aware of what can go wrong. Sometimes an improvement action might break an existing application. For instance, disabling legacy authentication can cause older email clients that use Basic Authentication to stop working. Before implementing, check with your application owners to ensure they have migrated to Modern Authentication. Have a rollback plan in case an application breaks. Secure Score is about improving security, but not at the cost of business continuity.

Another practical point: Secure Score does not cover every aspect of security. For example, it does not measure your incident response readiness or your user security awareness training. A high Secure Score is good, but it should be part of a broader security program. Use Secure Score alongside other tools like Microsoft Defender for Office 365, Microsoft Defender for Endpoint, and your own risk assessments.

Finally, use automation where possible. The Microsoft Graph API allows you to pull Secure Score data into your own dashboards. You can use PowerShell to get the list of improvement actions and their status. This is especially useful for managed service providers who need to track scores for multiple tenants. Automating the retrieval of Secure Score data helps you scale your security monitoring without adding manual work.