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Open a web browser.
Enter "http://(the machine's IP address or host name)/" in the address bar.
Click [Login].
Enter the login user name and login password, and then click [Login].
Point to [Device Management], and then click [Address Book].
Select the user or group, and then click [Change].
Select [User Authentication], and then click [Go to Next].
Select [On] in "Change Login Password".
Enter the new password in the [Login Password] box.
Enter the new password in the [Confirm Login Password] box.
Click [Go to Next].
Click [OK].
