I am helping out my neighbour with his camera setup. As he had problems with his installer after asking for his login credentials, to install extra camera's, I convinced him I am a nerd expert with these gadgets. 
He has a Hikvision DS-7608NI-K2/8P with 5 Hikvision IP-camera's. I have installed 2 extra Dahua IP-camera's and a Reolink 2K+ videodoorbell PoE (5 MP). It works like a charm every time when I leave his house. They record and can be seen live on Hik-Connect app.
The problem
After an unknown time, between 1 day and 1 week, the Hikvision NVR resets my (ONVIF) IP-camera login credentials (username nvr and password DrieXr@den#R) from the Reolink 2K+ videodoorbell, in the Hikvision NVR software, to default username admin and password 12345. So, obviously it does not record anymore on the NVR and cannot be seen in the Hik-Connect app. It can still be viewed directly via the Reolink app as the login credentials there remain thesame, as it should.
Things I have tried
Giving in to the bug(?) and changing the login on the Reolink videodoorbell to admin with 12345 cannot be done because the Reolink software needs at least 8 characters.
Only 2 Hikvision camera's are connected to the NVR PoE ports. All the rest via seperate PoE switches.
Anybody has any idea what I can do next?

He has a Hikvision DS-7608NI-K2/8P with 5 Hikvision IP-camera's. I have installed 2 extra Dahua IP-camera's and a Reolink 2K+ videodoorbell PoE (5 MP). It works like a charm every time when I leave his house. They record and can be seen live on Hik-Connect app.
The problem
After an unknown time, between 1 day and 1 week, the Hikvision NVR resets my (ONVIF) IP-camera login credentials (username nvr and password DrieXr@den#R) from the Reolink 2K+ videodoorbell, in the Hikvision NVR software, to default username admin and password 12345. So, obviously it does not record anymore on the NVR and cannot be seen in the Hik-Connect app. It can still be viewed directly via the Reolink app as the login credentials there remain thesame, as it should.
Things I have tried
- Changing the username and password in the IP-camera settings on the Hikvision NVR, several times. Even to username admin, with a different password (not 12345). It reverts again after a few days to password 12345.
- Updating the Hikvision NVR firmware from 4.74.200 build 230522 to 4.74.205 build 230712. After a few days, it reverted again to username admin and password 12345.
- Deselecting a checkbox I found somewhere in the Hikvision NVR config that allows IP-camera password changes. After 1 day it reverted to the username admin and password 12345 again.
Giving in to the bug(?) and changing the login on the Reolink videodoorbell to admin with 12345 cannot be done because the Reolink software needs at least 8 characters.
Only 2 Hikvision camera's are connected to the NVR PoE ports. All the rest via seperate PoE switches.
Anybody has any idea what I can do next?
Last edited: