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How to Troubleshoot Microsoft Purview DLP Alerts After KB5044285
Question details
Users need to resolve an issue where Microsoft Purview Data Loss Prevention alerts fail to trigger following the installation of a specific system update.
- Product
- Microsoft Purview
- Device & OS
- not provided
- Scenario
- A system administrator is managing compliance and data security policies after applying a recent software update.
- Observed behavior
- Microsoft Purview Data Loss Prevention (DLP) alerts stop generating entirely, even though the underlying DLP policy configurations have not been changed.
Before troubleshooting, ensure you have administrative access to the Microsoft Purview compliance portal and confirm that the KB5044285 update is installed on the affected machines.
Verify Configurations and Recreate the DLP Policy
Check the current policy configurations, review diagnostic logs, and recreate the policy to trigger a reset of the alert generation mechanism.
Often, system updates can cause temporary de-synchronization between policy enforcement engines and alerting services. Recreating the policy can force the system to recognize the rules again.
Log into the Microsoft Purview compliance portal, navigate to the Data loss prevention section, and check the policy settings to ensure alerts are still enabled.
Access the system event logs and Purview diagnostic logs in the compliance portal to check for any specific error codes related to policy enforcement failures.
Delete the affected DLP policy (after documenting its rules) and click 'Create policy' to build a brand new policy with identical parameters to test if alerts resume.
If the issue persists, visit https://learn.microsoft.com/en-us/answers/tags/284/microsoft-purview and post your detailed logs for community support.
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Frequently Asked Questions
Why did my Microsoft Purview DLP alerts stop after KB5044285?
The KB5044285 update may have introduced a bug or modified underlying system components that disrupted the communication between the DLP policy enforcement engine and the alerting service.
Do I need to change my DLP rules to fix this alert issue?
No, your existing rules are likely correct if they haven't changed. Recreating the exact same policy in the Microsoft Purview portal can often force the system to re-sync and fix the alerting issue without altering your data protection logic.
Where can I get advanced support for Purview DLP issues?
For specialized technical assistance, you can post your question with relevant diagnostic logs in the official Microsoft Purview community forums at learn.microsoft.com.
