Is there any specific way to ensure intrusion detection working do I need to set on camera in each camera or should all settings be on the NVR only or other ? I am pretty new to the NVR realm.
The 'real' settings are in the camera - after all, it's the camera that's doing the analytics.
The ability to change camera settings via the NVR is really just a passthrough as a convenience, and a central place to store a subset of settings for occasional refresh out to the camera.