1. If you know the ip of the poe nvr, you do not have to download this tool to search its ip. If you do not know, then you have to download this tool to your pc, which is  in the same network as your nvr: Install the Device Manage on your pc and search ip of the nvr. 
  1. Download Open Telnet to your pc, run it on pc and input the ip of the nvr and then click on Open Telnet 
  1. Download reset tool to your pc,  run the reset tool on pc 
you will get 2 safety codes: send to us 
we will send you the password after we get your safety code 
enter the ip of the nvr to the device ip, 
then click on Reset account.