You have to make sure that you are not using HTTP. This is an insecure protocol and we recommended to disable HTTP because it will lead to vulnerability scan results.
This article lists the initial troubleshooting steps for issues with ONVIF cameras, added to BVMS system as Live Only ONVIF cameras. The specific point in this scenario is VSG is not used.
The present document is intended to provide information on the VRM camera replacement functionality in the Bosch Video Management System (BVMS), as well as guidance through the process
Use the Project Assistant to its full extent and once the cameras are connected to the target network, perform a network scan using the BVMS Configuration Client