How to monitor DLP exposure across Microsoft 365 and Power Platform
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Monitor external sharing, mail redirects, Power Apps and Power Automate connectors around Microsoft Purview DLP, then rank findings and assign owners.
TL;DR
Microsoft Purview DLP inspects content and blocks known patterns, but it does not detect every exposure path. Check external sharing, external mail redirects, Power Apps shared with everyone, and Power Automate connectors that move data outside the tenant. Rank findings by sensitivity, assign owners, fix them through logged actions, and repeat checks on a fixed cycle.
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Governance takeaway
- Admins/CoE: Baseline sensitive sites and OneDrive sharing, then monitor external sharing, redirect rules, Power Apps, and Power Automate connectors so configuration changes do not reopen exposure.
- Security/Compliance: Prioritize labelled or confidential content and treat sites without sensitivity labels as findings, keeping remediation evidence for defensible reviews.
- Makers: Review flows and connectors that copy files to outside services, because connector use can create data paths outside the DLP policy.
- Leadership/Business: Require named owners, deadlines, and recurring checks so shared data remains governed as content and collaboration change.
Frequently asked questions
What does Microsoft Purview DLP miss when monitoring Microsoft 365 exposure?
Microsoft Purview DLP inspects content and blocks or warns on policy matches, but separate checks are needed for sharing, redirects, and connector paths.
Which Power Platform configurations can create DLP exposure?
Power Apps shared with everyone and Power Automate flows using connectors that move data to outside services can create exposure around content inspection.
How often should external sharing and mail redirects be checked for DLP exposure?
Check forwarding rules and external sharing on sensitive sites at least monthly, and check the wider tenant quarterly with owners and evidence recorded.