I have the UCC personal client 18.104.22.168 installed on a customer's Windows XP Pro notebook. For mobility reasons, he often connects both his wired and wireless NICs (i.e., he leaves the wireless connection on, but also connects the wired connection). This appears to play havoc with the UCC and its licensing by MAC address; sometimes the UCC will work, and sometimes it won't. Is there anything I can do about this? Note that this is also an issue for someone who uses a wired connection in the office, but a wireless connection on the road.