Send an email to Dahua Support with your device's full serial number and the date shown on the screen.
There is a massive misconception online. Many users look for a "Dahua password reset by serial number" because they think they can just hold down a button. dahua password reset by serial number
Enter this code into the password field on the device. Once logged in, immediately go to Main Menu → Account to set a new permanent password. Method B: Using the DMSS Mobile App (Quickest Way) Send an email to Dahua Support with your