You can change the main administrator password using Web Config.
Changing the password avoids unauthorized reading or modification of the information stored on the device, such as IDs, passwords, 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 printer's IP address 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 > Network Status > Wired LAN/Wi-Fi Status
Enter the administrator password to log in as an administrator.
Select the following menu.
Product Security tab > Administrator Settings > Change Administrator Password
Enter the current password in Current password.
When you configure the username for administrator, enter the User Name.
Enter the new password in New Password and in Confirm New Password.
Click OK .
To restore the administrator password to the initial password, click Restore Default Settings on the Change Administrator Password screen.