If you log in to Web Config as a sub administrator, you can change the sub administrator's password.
On a computer connected to the same network as the printer, open a browser and enter the printer's IP address.
You can check the printer's IP address using the following menu.
Enter the sub-administrator's user name and password to log in as the administrator.
Select the following menu.
Product Security tab > User Settings
Enter your current password in Current password, and then your new password in New Password and Confirm New Password.
Select OK.