Microsoft Purview DLP: Why Policies Aren’t Triggering in Teams and SharePoint

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Microsoft Purview Data Loss Prevention (DLP) is a powerful tool for protecting sensitive information across Microsoft 365 workloads. However, it’s not uncommon for DLP policies to fail to trigger in Microsoft Teams and SharePoint.

Understanding Microsoft Purview DLP Policies

Before we dive into the reasons why DLP policies may not trigger, let’s review how they work across M365 workloads.

Common Reasons for Non-Triggering Policies

• Scope: Ensure that your DLP policy scope includes Teams and SharePoint.
• Sensitivity Labels: Review and adjust sensitivity labels if needed.
• Synthetic Data: Test policies with synthetic sensitive data files.

Verifying DLP Policy Scope

To verify that your DLP policy scope includes Teams and SharePoint, navigate to the Microsoft Purview compliance portal and review your policy settings.

Testing with Synthetic Data

Create synthetic sensitive data files and upload them to Teams or SharePoint to test your DLP policies.

Checking Activity Explorer

Review the DLP activity explorer for policy match events. If no matches are found, it’s a sign that your policy needs adjustment.

Adjust Sensitivity Labels if Needed

If your synthetic data files are being missed by the DLP policies, consider adjusting the sensitivity labels to better match the content you’re trying to protect.

Conclusion

By reviewing DLP policy scope, testing with synthetic sensitive data, checking Activity Explorer for policy match events, and adjusting sensitivity labels if needed, you can ensure that your Microsoft Purview DLP policies are effectively protecting sensitive information in Microsoft Teams and SharePoint.

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