In fact with the last version of fusion, Lync 2013 client is just crashing when it want to access the USB device connected to the VM ...
I've had just the same problem today and ended up solving it by downgrading the USB controller in the VM from 3.0 to 2.0 within the advanced USB options.
There have been lousy support for Lync in Fusion all through the years since Communicator.
It would really help if VMWare could at least acknowledge the problem and provide some kind of tips on how to proceed.
Lync is a de facto communication standard in many organizations these days and without proper support the value of a virtual machine is severely diminished.
Get your act together VMWare! Give us something to go on!