The Microsoft Security stack aligns broadly into five interconnected layers.
1. Identity and Access Security
Identity is the foundation of the stack.
Using Microsoft Entra, organizations secure:
- User and workload identities
- Privileged access
- Authentication and authorization
- Risk-based access decisions
Identity signals feed into every other layer of the security stack, enabling early detection of compromise.
2. Endpoint, Server, and Device Protection
Endpoints and servers remain critical attack targets.
With Microsoft Defender, the stack provides:
- Endpoint detection and response
- Behavioral threat detection
- Vulnerability and exposure insights
- Automated remediation
Endpoint telemetry is correlated with identity, email, and cloud activity to build full attack narratives.
3. Email, Collaboration, and SaaS Security
Email and SaaS platforms are common initial access vectors.
Microsoft Security protects:
- Email and collaboration tools
- Embedded links and attachments
- User behavior following email interaction
- Application access and permissions
These signals are essential for identifying phishing-led and identity-based attacks.
4. Cloud and Infrastructure Security
As organizations adopt cloud-first models, the security stack extends to:
- Cloud workloads and virtual machines
- Containers and APIs
- Management and control planes
- Data access and sharing
Cloud telemetry is treated as first-class security data and integrated into detection workflows.
5. Detection, Investigation, and Response
This layer brings everything together.
Microsoft Security correlates signals across all layers into incidents, enabling:
- Cross-domain detection
- Incident-centric investigation
- Coordinated response actions
- Automation and orchestration
These capabilities are deeply integrated with Microsoft Sentinel, which adds large-scale analytics, advanced hunting, and SOAR automation.
Learn More: What Is Microsoft Sentinel? Architecture & Detection Explained