You can't do it at the Control panel, you have to be in the copiers web page (CWIS)
Take the IPv4 address listed on the machine when you select Machine Status.
Go to your PC and open your web browser of choice (Internet Explorer,Firefox, Safari)
Put the IPv4 address in the address bar and it will load CWIS.
Select Address Book at the top (If prompted for login, it is probably username = admin password = 1111)