Data Loss Prevention

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  DLP stands for Data Loss Prevention — and it’s all about protecting sensitive information from being accidentally (or intentionally) shared, leaked, or exposed.

🔐 What Does DLP Do?

DLP helps you:

  • Identify sensitive data (like credit card numbers, SSNs, health records, etc.)

  • Monitor where it goes (email, Teams, SharePoint, OneDrive, etc.)

  • Prevent it from leaving your organization (based on rules you set)

💡 Real-Life Example

Say someone tries to email a spreadsheet that contains customer credit card numbers to an external email address — with DLP:

  • The system detects the pattern (like 16-digit credit card numbers)

  • It blocks the email or gives a warning to the user

  • You (the admin) can get alerted and track it

🔍 What Can It Protect?

DLP in Microsoft 365 works across:

  • Exchange Online (email)

  • SharePoint Online

  • OneDrive for Business

  • Microsoft Teams (chats & channels)

  • Endpoints (with Microsoft Defender for Endpoint)

🧠 How Does It Work?

You define:

  • Sensitive info types (like financial data, personal info, custom keywords)

  • Rules/policies (e.g., "If SSNs are found in an email going outside the org, block it")

  • Actions (alert, encrypt, block, notify, log)

🏷️ Included In...

  • M365 E3: Basic DLP (Exchange, SharePoint, OneDrive)

  • M365 E5: Advanced DLP (plus Teams, Endpoint DLP, deeper analytics & policy tuning)

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