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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.
Make sure that the [Wizard Method] tab is selected, and then click [Change].
Select the [User Authentication] check box in the [Authentication Management] area.
Click [Go to Next].
Click [On] next to [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].
Click [Logout].
