We have a Cisco 2821 running CME 4.1 with intergrated Unity Express. We have 2 4 port FXO cards used for inbound and outbound calling. 4 ports ring inbound to an auto attendant and the other 4 lines ring through and are bridged appearances on the helpdesk staff persons phones. The issue that I am having is that for the calls that pass through the auto attendant there is no caller ID displayed on the phone that the call is transferred to. For the lines that ring directly through it works fine. The fact that it works fine for the direct lines says that the carrier is passing the caller ID and that the FXO cards are capable of detecting it. Can anyone point me in the right direction on how to isolate or resolve this issue.