Starting from Forcepoint DLP Endpoint v21.03, enabling web file uploads analysis is required to detect file uploads on the Web channel:
Steps
Log on to the Forcepoint Security Manager and open the DATA module.
Go to Settings > General > Endpoint.
On the Detection tab, select Enable web file uploads analysis.
Enter the URL for the specific domain you want to monitor, then click Add. You can add multiple domains. If you want to monitor all domains, enter *, then click
Add.