I'm trying to get IP Communicator and Extension Mobility to work with a user defined device name. Unfortunately, no go. When I try to login, I get "Login Unsuccessful" and an Error  on the status line of the phone. When I look at the trace files, I get:
7: Jan 11 16:06:07.454 EST %EM-3-UNK:0: LoginService: Dev: SEP000CF1CD12CD- Error #11 - Policy Violation: Device does not exist: Device does not exist
Where SEP000CF1CD12CD is the original name of the device/NIC.
What gives? Anyone had this problem?