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Log in to Unified Communication System Settings.
For details about how to login to Unified Communication System Settings, see Login and Logout.
Click [Address Book].
"Registration Request" appears at the top of Address Book if a request is received.
Click [Accept] for the contact you want to accept.
Confirm the information of the contact, and then click [Accept].
The accepted contact is added to Address Book.
To decline the registration request, click [Decline] in step 3.
