One thing I found out is that there's a conflict when you copy a PIM.VOL file and configured exchange activesync at the same time. You can either copy the PIM.VOL file over, reboot your phone and then manually configure exchange activesync or auto configure exchange activesync, let it sync, manually move PIM.VOL then reboot.
Does anyone know the default registry entry for autoconfig found at
I wonder if there is a way to reset the configuration so that the UC runs a second time to a different file name