CISO Risk Reviews: 8 Microsoft Security Best Practices

Introduction

Microsoft is urging security leaders to make risk reviews more structured and proactive as cyberthreats scale in volume and sophistication. In a new Deputy CISO post, Rico Mariani outlines eight practical areas to review so teams can turn security data into better decisions, not just faster incident response.

For IT and security administrators, the message is clear: risk reviews work best when they consistently examine the same foundational controls and assumptions.

What’s new in Microsoft’s guidance

Microsoft highlights eight focus areas for conducting risk reviews:

• Assets: Identify the systems, data stores, and privileged services that matter most. Architecture diagrams and threat models should define review scope.
• Applications: Review customer-facing apps and supporting services as potential attack paths to sensitive assets.
• Authentication: Favor strong, standards-based token systems such as Microsoft Entra, and avoid overly broad or long-lived tokens.
• Authorization: Ensure access controls are consistently enforced. Good authentication can still fail if authorization logic is weak or ad hoc.
• Network isolation: Segment environments to reduce blast radius if an attacker gains a foothold.
• Detections: Validate whether security teams can actually detect misuse, abuse, or suspicious activity across critical systems.
• Auditing: Confirm logs are complete, useful, and available for investigations and review.
• Things not to miss: Use the review to surface blind spots, edge cases, and overlooked dependencies.

Why this matters to administrators

This guidance aligns closely with Zero Trust principles: assume breach, limit privilege, and verify continuously. For Microsoft environments, that means reviewing how Entra-issued tokens are scoped, whether privileged applications have excessive access, and whether standard authentication libraries and declarative authorization models are in use.

Administrators should also note the operational angle. Risk reviews are not just for executives—they can expose weak token design, inconsistent API authorization, poor segmentation, or missing audit coverage before those issues become incidents.

Recommended next steps

• Map your critical assets and the applications that access them.
• Review token lifetimes, scope, and privilege levels for sensitive workloads.
• Check for custom authentication or authorization code that could introduce avoidable risk.
• Evaluate network segmentation around high-value systems.
• Test whether your detections and logs would support investigation of token abuse or lateral movement.
• Use the eight-point model as a repeatable checklist for future security reviews.

Microsoft’s post is less about introducing a new product and more about improving security discipline. For organizations managing complex Microsoft estates, that kind of structured review process can meaningfully reduce exposure.