Data Loss Prevention (DLP) is no longer optional for businesses handling sensitive information. Microsoft Purview provides enterprise-grade DLP that integrates natively with Microsoft 365. Here is how to implement it correctly.
Data Loss Prevention (DLP) protects sensitive information from accidental or intentional disclosure. Whether driven by compliance (HIPAA, GDPR, PCI-DSS) or business requirements (intellectual property protection, customer data security), DLP has become a baseline security control for businesses of all sizes.
Microsoft Purview (formerly Microsoft Information Protection) provides DLP capabilities native to Microsoft 365. For organizations with Microsoft 365 E5 or compliance add-on licensing, Purview DLP is included at no additional cost — and is significantly more capable than third-party DLP tools costing tens of thousands of dollars annually.
What Purview DLP can detect and protect: Credit card numbers, social security numbers, and other PII (Personally Identifiable Information). Healthcare information including ICD-10 codes, NPI numbers, and HIPAA-protected data. Financial data including bank account numbers and routing numbers. Custom sensitive information using regular expressions and keyword dictionaries. Documents with sensitivity labels indicating confidentiality. Source code, intellectual property, and trade secrets.
Where Purview DLP enforces policies: Microsoft 365 services (Exchange, SharePoint, OneDrive, Teams). Endpoint DLP on Windows 10/11 and macOS devices (file copy, USB transfer, cloud upload). Microsoft 365 Apps (Word, Excel, PowerPoint) for in-app warnings. Third-party SaaS applications via Defender for Cloud Apps integration.
CloudTechForce implementation methodology: Phase 1 (Discovery) — identify sensitive data types and where they exist using Purview content explorer. Phase 2 (Policy design) — create DLP policies for each data type with appropriate actions (warn, block, encrypt). Phase 3 (Pilot) — deploy policies in audit-only mode to identify false positives. Phase 4 (Tuning) — refine policies based on pilot results. Phase 5 (Enforcement) — switch policies from audit to enforce mode. Phase 6 (Training) — educate users on what triggered policies and how to handle sensitive data correctly.
Results from CloudTechForce client deployments: 90%+ reduction in unauthorized sensitive data sharing, full compliance with HIPAA, GDPR, and PCI-DSS data handling requirements, dramatically improved audit readiness, and elimination of expensive third-party DLP tools. Purview DLP implementation is included in our managed Microsoft 365 services for E5 customers.
