If it gives an 'IP conflict' error there is something wrong with the network settings.
This is what it shows if I change the IP address manually. The conflict box then goes away. But as you can see, still no signal.
Was this on the PoE port of the NVR? And did you also change the camera IP address to match?
My suggestion to try:
Plug the camera back into the LAN and set the IP address to a LAN value, presumably the camera can be seen and configured with SADP.
Using the web GUI, add the camera to the NVR using manual add. For the 7716, pick an unused PoE port, select 'Modify', change to manual instead of Plug&Play, set the IP address to that of the camera, protocol=Hikvision, port=8000, userID and password, click OK. For the 7732, just use Add.
Check in Live View if it's visible, go back to camera configuration to check status.