Why Microsoft Secure Score Should Be Reviewed Monthly

Microsoft Secure Score is the single most underused governance signal inside Microsoft 365. It is free, already enabled in every tenant, and it expresses the security posture of your environment as a number that goes up or down as configuration changes. Yet in most of the tenants Cleverina is asked to review, Secure Score has not been opened in months — and the number has quietly drifted by ten or fifteen points.

Drift is the point. Secure Score moves whenever Microsoft adds a recommendation, whenever a new license unlocks a control, whenever an administrator turns something off to unblock a project, and whenever your user population changes. A monthly review is the lightest possible cadence that catches all of those movements before they compound.

What a monthly Secure Score review actually contains

A useful review is more than logging in and screenshotting the dashboard. The 30-minute version we run with clients covers four things:

• Delta since last month: which recommendations moved, which new ones appeared, which regressed.
• Top three unimplemented recommendations by points, with a decision recorded — implement, defer with reason, or accept the risk.
• Identity hygiene check: privileged accounts without MFA, stale guest accounts, accounts excluded from Conditional Access.
• License vs. control gap: features you are paying for but not enforcing (Defender for Office 365 Plan 2, Entra ID P2, Purview).

The output is a one-page note in your governance log — not a slide deck. The goal is a paper trail an auditor can read, not a campaign.

Why monthly and not quarterly

Quarterly reviews are too slow for two reasons. First, Microsoft ships changes weekly; a quarter is long enough for three or four new recommendations to be added and ignored. Second, the human cost of a quarterly review is much higher because you are now reconstructing three months of changes from logs instead of glancing at last month's note. Monthly cadence keeps each review small enough that nobody dreads it.

An anonymized example

A mid-sized professional-services firm we worked with had a Secure Score of 71% in January and 58% by June, without anyone noticing. The decline was almost entirely identity: three new admin roles created during a project rollout had been excluded from the MFA Conditional Access policy 'temporarily,' and the exclusion was never removed. A monthly review would have surfaced the drop the month after it happened, when the fix was a five-minute policy edit. Six months later, it was a remediation project.

Practical recommendations

• Assign a named owner for Secure Score — usually the M365 administrator, with the CISO or compliance manager as the second signature.
• Set a recurring 30-minute calendar invite on the first business day of each month.
• Track the score in a simple spreadsheet alongside the three decisions taken that month.
• When you defer a recommendation, write the reason and the review date. 'Not now' is a valid answer; 'no answer' is not.
• Tie the monthly review into your broader compliance program so the same evidence supports ISO 27001, NIS2 or CIS reporting.

Conclusion

Secure Score will not catch every risk in a Microsoft 365 tenant, but it is the cheapest baseline available and the easiest to operate. The organizations that run a disciplined monthly review are almost always the ones with the fewest avoidable incidents. If you would like help establishing the cadence and tying it into your wider governance program, our Microsoft governance services are a sensible place to start, and our solutions page outlines how it fits into the broader picture.