I would say set a new Password for NVR, then reset the Cameras.
Those Poe NVR's normally automatically initialize the Cameras with the NVR's password.
Btw you can plug your PC/Laptop into an Poe Port of the NVR and access the Cameras directly via Browser or Config Tool
Those Poe NVR's normally automatically initialize the Cameras with the NVR's password.
Btw you can plug your PC/Laptop into an Poe Port of the NVR and access the Cameras directly via Browser or Config Tool