You can set the administrator password using Web Config.
Changing the password prevents unauthorized reading or modification of the information stored on the device, such as ID, password, network settings, contacts, etc. It also reduces a wide range of security risks, such as information leaks in network environments and security policies.
Enter the printer's IP address into a browser to access Web Config.
Enter the IP address of the network (standard/additional) you want to configure from a computer that is connected to the same network as the printer.
You can check the IP address of the printer from the following menu.
Settings > General Settings > Network Settings > (Standard or Additional) > Network Status > Wired LAN/Wi-Fi Status
Enter the administrator password to log in as an administrator.
Select in the following order.
Product Security tab > Change Administrator Password
Enter the current password in Current password.
Enter the new password in New Password and in Confirm New Password. Enter the user name, if necessary.
Click OK .
To restore the administrator password to the initial password, click Restore Default Settings on the Change Administrator Password screen.