Is there a way to check logs for Remote Desktop Assistance sessions?

We provide support to end users (Windows XP) via Remote Desktop Assistance from ADUCplus on our Windows 2003 servers. I’m trying to find out if there are logs kept that would show us how often Remote Desktop Assistance is being used by our support staff? Is there a log of each session kept on the PC or Server that the session was initiated from or is it kept on the end users client computer? Perhaps an Event ID?
I’d like to be able to differentiate between a Remote Desktop Connection session and Remote Desktop Assistance session (shadow session), if possible.

Thanks.