Hi,
I have changed my NVR from DS-7608NI-I2/8P to DS-7616NI-M2/16P because I needed more cameras. On the older I2 (with NVR 4.0) I used to view the live view with VCA info turned on (i.e. seeing the green boxes where any movements were happening). And that worked fine for the 6 cameras I had it...