Deep Dive: Insider Risk Management in Microsoft Purview

Great deep dive, thanks for sharing your lab notes! You’ve outlined the Insider Risk Management (IRM) workflow really clearly — especially the way it ties together governance, compliance, and security within Microsoft Purview. I agree that the balance between transparency and privacy is one of the most critical challenges, since organizations want to protect data without creating a culture of surveillance.

In practice, I’ve found that IRM works best when:

✅ Policies are scoped carefully — targeting high-risk activities (e.g., large file downloads, offboarding employees, sensitive data exfiltration) instead of applying blanket monitoring.

🔄 Cross-team alignment — Security, HR, and Legal need to collaborate so alerts don’t just generate noise but lead to meaningful actions.

📊 Continuous tuning — Reviewing false positives and refining thresholds helps build trust in the system.

🔗 Integration with Defender & SIEM — As you noted, tying IRM into Microsoft Defender and Sentinel gives full visibility and allows faster incident response.

Your observation that IRM is most powerful when integrated across the Microsoft 365 ecosystem is spot on. It’s not just about catching violations — it’s about building a proactive framework where risky behaviors can be corrected before they escalate.

Looking forward to hearing how others are operationalizing this in production environments.