implementing-data-loss-prevention-with-microsoft-purview

# Implementing Data Loss Prevention with Microsoft Purview ## When to Use - Deploying DLP policies to prevent sensitive data (PII, PHI, PCI, intellectual property) from leaving the organization through email, cloud storage, chat, or endpoint file operations - Configuring sensitivity labels with encryption, content marking, and auto-labeling to classify documents and emails by confidentiality level - Creating custom sensitive information types with regex patterns to detect organization-specific data formats (employee IDs, project codes, internal account numbers) - Deploying endpoint DLP to control copy-to-USB, print, upload-to-cloud, and copy-to-clipboard actions for labeled or sensitive content on managed devices - Investigating DLP incidents through Activity Explorer to analyze policy match events, user activity patterns, and false positive rates for policy tuning **Do not use** without appropriate Microsoft 365 E5, E5 Compliance, or E5 Information Protection licensing. Do not deploy DLP policies directly to production enforcement mode without a simulation period. Do not configure endpoint DLP without coordinating with the endpoint management team responsible for device onboarding. ## Prerequisites - Microsoft 365 E5 or E5 Compliance / E5 Information Protection add-on license assigned to target users - Global Administrator, Compliance Administrator, or Compliance Data Administrator role in the Microsoft Purview portal - Exchange Online PowerShell module (ExchangeOnlineM...