The person that installed theses cameras is MIA. They have asked me to take over but I can't get into the NVR. What do I use to get in without having to reset the whole system?
Yes, I agree with Looney, looks like you're in, is it asking for password when you try to change anything?
What about hitting the unit's LAN IP from PC with a browser?
Looks like they are sold by DCD Security in California.
You might have to call them and seek some support or info.