Microsoft Purview Insider Risk Management
Tenant-wide Data Leaks policy detecting authorized-insider data exfiltration through behavioral analytics and sequence detection
Difficulty
Advanced
Environment
Microsoft 365 tenant (securem365lsb.onmicrosoft.com)
Deployment
Home Lab
Est. Implementation
4-6 hours
Executive Summary
This project configures and validates Microsoft Purview Insider Risk Management with a tenant-wide Data Leaks policy, moving from an empty solution instance through analytics enablement, indicator and privacy configuration, and a fully scoped policy that reaches Healthy status with activity scoring actively initiated for a test user.
Every configuration step is backed by a screenshot captured during the lab build, with no invented configuration values, following an evidence-only documentation standard.
Business Problem
Regulated and data-sensitive organizations need visibility into risk posed by authorized insiders — employees who already have legitimate access to sensitive data but who may exfiltrate it accidentally or intentionally, for example before resignation. Perimeter controls such as firewalls and Conditional Access do not address this risk because the actor is an authenticated, authorized user operating within their normal access boundaries.
Without a dedicated insider risk solution, low-signal individual activities such as a SharePoint download, a removed sensitivity label, or a file archived and copied to USB go undetected in isolation, even though the same activities performed in sequence are a strong indicator of intentional data exfiltration.
Business Risks
- Undetected multi-step exfiltration sequences (download, obfuscate, exfiltrate, delete) by authorized users
- Departing employees taking sensitive data before resignation
- Sensitive data such as credit card information leaving the tenant through prioritized SharePoint sites
- Lack of role-based visibility into insider activity due to unassigned Analyst/Investigator role groups
Compliance Concerns
- PCI-relevant data handling
- Regulatory data governance obligations
- Zero Trust insider threat visibility
Solution Overview
Enabled analytics at both tenant and user aggregation levels to build a behavioral baseline.
Configured solution-wide settings: privacy/pseudonymization, policy indicators (Office, Device, Defender for Endpoint, Risky browsing), intelligent detections, and domain lists.
Reviewed the seven built-in Insider Risk Management role groups for least-privilege administration.
Built a tenant-wide Data Leaks policy from a Microsoft Quick Policy template, with content prioritization, tenant-specific thresholds, and full sequence detection.
Submitted the policy, confirmed Healthy status, and started activity scoring for a named test user to validate the deployment end-to-end.
Architecture
Architecture diagram placeholder
Technology Stack
Microsoft Purview Insider Risk Management
Core solution for behavioral analytics, indicator configuration, and policy management
Microsoft 365 Unified Audit Log
Source of Office and Device activity indicators
Microsoft Defender for Endpoint
Source of defense-evasion and unwanted-software indicators (P2 required)
Microsoft Purview Data Loss Prevention
Optional trigger and prerequisite for the Data Leaks policy template
Microsoft Entra ID Protection
Identity-risk indicators feeding into insider risk scoring
Microsoft Purview Roles and Scopes
RBAC role groups governing Insider Risk Management administration
Lab Environment
- Tenant
- securem365lsb.onmicrosoft.com
- Policy Template
- Data Leaks (Quick Policy)
- Scope
- All users, groups, and adaptive scopes
- Prioritized Content
- Team Site (SharePoint), Credit Card Number (SIT)
Implementation
A phased, expandable walkthrough. Screenshots and evidence can be attached to each phase.
Enabled tenant and user-level analytics to establish a behavioral baseline, and configured pseudonymized usernames for privacy-by-design alert triage.
- Navigate to Insider Risk Management from the Purview Solutions menu
- Review the Overview page and recommended actions
- Configure Analytics settings (tenant + user level insights: On)
- Configure Privacy settings (pseudonymized usernames selected)
Screenshots for this phase can be added here.
PowerShell
Illustrative example snippets — copy or download each script. Production values are placeholders.
Insider Risk Role Group Verification
# Connect to Security & Compliance PowerShell (required for Purview role and policy verification)
Connect-IPPSSession -UserPrincipalName admin@securem365lsb.onmicrosoft.com
# Review Insider Risk Management role group membership
Get-RoleGroupMember -Identity "Insider Risk Management"
Get-RoleGroupMember -Identity "Insider Risk Management Analysts"
Get-RoleGroupMember -Identity "Insider Risk Management Investigators"Configuration Screenshots
Click any tile to open the lightbox. Real screenshots will replace these placeholders.
Phase 1
Phase 2
Phase 3
Phase 4
Phase 5
Validation
Analytics enabled (tenant + user level)
Confirmed via Purview portal settings — Pass
Privacy/pseudonymization configured
Confirmed via Purview portal settings — Pass
Office, Device, Defender, Risky Browsing indicators enabled
Confirmed via Purview portal settings — Pass
Role groups reviewed
Partial — specialized groups have 0 assigned users
Policy created from Data Leaks template
Confirmed via policy wizard — Pass
Content prioritization configured
Confirmed via policy wizard — Pass
Triggering event and thresholds configured
Confirmed via policy wizard — Pass
Sequence detection configured
Confirmed via policy wizard — Pass
Policy submitted and reaches Healthy status
Confirmed in Policies list — Pass
Activity scoring started for test user
Confirmed via Policies action — Pass
Challenges
Missing role-group alert-view permission
The signed-in session lacked a role group with alert-viewing permission, surfaced directly by a banner on the Policies page; documented as a known limitation rather than resolved in place.
Unconfigured optional connectors
Cloud Apps, Cloud Storage, Microsoft Fabric, and Network indicator categories remained at 0 selected because their underlying connectors were not configured in this lab.
Lessons Learned
- Enabling an indicator at the solution-settings level does not guarantee it is available at the policy level — indicator availability can still be individually gated during policy creation.
- A "Healthy" policy status is a structural validation, not proof of active alerting; explicit test-user scoring is a necessary additional step.
- Several of the richest indicator categories depend entirely on optional connector prerequisites (Defender for Cloud Apps, Microsoft Fabric, physical badging) that are easy to overlook when following the Quick Policy path.
Business Impact
Healthy
Policy Status
126
Indicators Reviewed
Sequence-Based
Detection Model
Test-User Verified
Validation
Skills Demonstrated
Related Certifications
Certifications this project maps to are highlighted.
Related Blog Articles
Placeholder cards — future TechCertGuide integration.
GitHub Repository
Microsoft-Insider-Risk-Management
PublicEnterprise implementation of Microsoft Purview Insider Risk Management with a tenant-wide Data Leaks policy
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Architecture Diagram
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PowerShell Scripts
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