They will send back a "Reset File" or "Key" to unlock the unit. 2. Password Reset via Guided Questions
There is often an option to reset the device password via a verification code sent to your registered email. Security Best Practices
If you’ve inherited a DVR-208G-F1 or simply forgotten your credentials, you cannot simply look up a "backdoor" code. You must use one of the following official reset methods: 1. Using the SADP Tool This is the most common method for professional installers.
You must create your own strong password during the initial setup.
Export the XML file and send it to your local HiLook/Hikvision technical support.