Intrust cannot gather message tracking logs from Exchange 2003 server if "Agent" option enabled.
As a workaround, collect the message tracking logs without "Agent".
The reason why it does not collect the log files is because the key in the registry has been changed where the share information is stored.
Before on Exchange 2000 server this info was stored MSExchangeSA\Parameters, and for the new Exchange 2003 it creates a subkey with name instance of the exchange server. (see attachment picture1.jpg)
There are two workarounds available to gather messaging tracking logs from an Exchange 2003.
1- To add a server name value subkey in the registry key "W3TA" - is a server name.
2- Or to collect without agents.