With the Cloud Sandbox subscription, you can manually submit suspicious files for analysis by uploading it to the Sandbox Scanning Portal: http://filecheck.zscaler.com/.
After you upload a file, the Sandbox engine does the following:
When the Sandbox analysis is complete, you can see How do I interpret Sandbox Scanning Portal results? for more information about the results. You can also see How do I view the Sandbox Detail Report? for instructions on how to view the Sandbox Detail Report.