Phones - Is there a way to remove a Polycom phone from the Unknown Phones list under Phone Feature Packs?

There is no way manually remove the phones but they should disappear after two weeks. The only way to change the IP Address for a Polycom phone on the server, in the Unknown Phones list (under Setup > Phones: Phone Feature Packs), is to go through the Provisioning Guide and reset and re-register with a new IP address.