IT KORR Knowledge Center
Microsoft Security Operations Guide
A guide to ongoing security operations across the Microsoft 365 security stack — monitoring, review cadences, and incident response touchpoints.
Purpose
This guide covers the ongoing operational practices that keep a Microsoft 365 security posture current after initial implementation — see Microsoft 365 Security Architecture for the underlying five-layer model this operations guide monitors.
Identity Layer Operations
- Monitor Entra ID Protection risk detections and respond per defined thresholds.
- Review PIM activation logs for unusual patterns.
Email Layer Operations
- Review Defender for Office 365 threat reports for trends.
- Review quarantined messages for false positives affecting business operations.
Endpoint & Data Layer Operations
- Review Defender for Endpoint alerts and device compliance status.
- Review Purview data loss prevention policy matches for tuning opportunities.
Related Resources
- Microsoft 365 Security Architecture — /knowledge-center/cloud-productivity/microsoft-365-security/microsoft-365-security-architecture