What is the latest firmware version for the expansion module? I just updated the firmware in the Endpoint Manager and it says 2.0.3.98 for the EXP100 and 2.0.4.14 for the phones.
That is correct currently EXP100 is using 2.0.3.98. New firmware for it due out in the next week to fix some bugs when trying to use more then 1 expansion module in a phone.