If your .mp4 file was quarantined, you can typically review and manage it through these official portals:
: If you believe it is a false positive, you can Submit to Microsoft for analysis to improve their detection accuracy. QUARANTENA.mp4
: Navigate to the Microsoft 365 Security Quarantine Page to view a list of all your quarantined items. If your
: You can often select "Preview message" or "View message headers" to see details about why the system flagged the video. If your .mp4 file was quarantined
: From this portal, you can select the file and click "Release" or "Request release" if you are certain the file is safe.