Enterprise DLP, Microsoft Teams, and Non-File Inspection/Blocking

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Enterprise DLP, Microsoft Teams, and Non-File Inspection/Blocking

L1 Bithead

I'm working on testing an Enterprise DLP data profile that includes blocking traffic for non-file-based detections (e.g., PCI data in a Teams message).  For file-based detections, the behavior is fairly straight-forward: the upload fails, Teams throws an error, user weeps.  For non-file-based detections... Teams behaves strangely.

 

Teams will, seemingly indefinitely, continue to try and try to post the message that the firewall will block.  It doesn't appear to have a sane retry or failure state like it does with file-based detections.  It will also spam the firewall and E-DLP portal with events and evidence.

 

I'm curious if anyone has observed this behavior, or might have an idea of how to get Teams... if possible... to fail a bit more gracefully in cases like this.

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