Now that the UCCX 8.0 is a Appliance model OS the licensing is not bound to the network interface but is generated from the install info.
Log into the CLI of the UCCX server with a SSH client or the console:
Cisco Unified Contact Centre Express 22.214.171.12400-41
UCCXSERVER login: crsadmin
>>admin: show status
Host Name : UCCXSERVER
Date : Wed Aug 4, 2010 19:48:11
Time Zone : Mountain Daylight Time (America/Denver)
Locale : en_US.UTF-8
Product Ver : 126.96.36.19900-41
OS Ver : 188.8.131.52-36
License MAC : 11a444c7788d
This license MAC is the one that the Licensing team needs to use to cut the license. This needs to be run on the Primary UCCX server.