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KKiat's avatar
KKiat
Copper Contributor
Aug 04, 2025

MS Purview for DLP Endpoint not working.

Hello Teams, need help on DLP Endpoint to prevent user to upload sensitivity label files to untrusted domain. Initially it working as expected when I configure as individual user in the policies but...
KKiat's avatar
KKiat
Copper Contributor
Aug 25, 2025

Hi Prathista Ilango​ ,

I have check everything is configured as your step provided. It is working but there is something weird. Same block file if it selected and uploaded from File Share Server it somehow bypasses the block.

But it blocked when upload from laptop directory. 

 

  • Prathista Ilango's avatar
    Prathista Ilango
    Icon for Microsoft rankMicrosoft
    Aug 26, 2025

    Hello KKiat,

    I am assuming this file share server is onboarded into devices in purview, since you confirmed all the above checks are done. Looks like Network share coverage is not enabled in your case. Please confirm from below,

    Purview Portal -> Settings -> Data Loss Prevention -> Endpoint DLP settings -> Network share coverage and exclusions

    This needs to be enabled for network shares to honor DLP policies. 

    Refer to: https://learn.microsoft.com/en-us/purview/dlp-configure-endpoint-settings?view=o365-worldwide#network-share-coverage-and-exclusions 

    Hope this helps!

    Regards,
    PI

    Please mark as solution, if you find the answer helpful. This will assist others in the community who encounter a similar issue, enabling them to quickly find the solution and benefit from the guidance provided.

     

    • KKiat's avatar
      KKiat
      Copper Contributor
      Aug 26, 2025

      Hi Prathista Ilango​ ,

      I had enabled Network share coverage and exclusions but still having issue.

      When I try upload document from this mapped drive A:\DLP Sample Document, those document does not block by DLP endpoint. But if I copy those files to laptop/device desktop and upload it will be blocked.