DLP

Data loss prevention (DLP) is the family of Microsoft Purview policies that detect when sensitive data is being shared or moved and take action — block, warn, or audit. Out-of-the-box and custom sensitive information types identify credit-card numbers, government IDs, source code, and many other patterns. DLP policies apply across Exchange (outbound email), SharePoint and OneDrive (file sharing), Teams (chat and channel messages), and endpoint DLP on managed Windows and Mac devices. Higher tiers add detection inside Microsoft 365 Copilot interactions and across non-Microsoft cloud apps via Defender for Cloud Apps. DLP requires Microsoft 365 E5 or appropriate Purview add-ons.