Dahua DH-XVR54 L-I2 Series User Manual page 64

A pop-up message is displayed asking if you want to sync the password with the remote
devices.
Click Cancel, the resetting is finished.

Click OK, the Sync Info page is displayed.

This message appears only when there are digital channels instead of only analog channels.
5.1.3.3 Using Reset Button on the Mainboard
You can always use the reset button on the mainboard to reset the Device to the factory default.
Sync password
Sync info
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User's Manual