Offline Files hung up on old, nonexistent server

I implemented DFS in our environment recently so I could redirect users to a
new location for file shares and take an old file server offline. The new
file shares on DFS have been working beautifully for weeks now, but today I
noticed that my computer's Offline Files feature is notifying me that I'm
working offline because it can't connect to the old server. I've looked at
my offline files and synchronization settings, and I can't find any trace of
anything that still references the old server. Does anyone know how I can
eliminate the lingering references to the old server that are apparently
causing this behaviour? I'll probably need to do this for all workstations
in my domain, so group-policy-friendly ideas are particularly welcome.

Thanks in advance,

Bryan