The purpose of Siebel Audit Trail is to tracks changes to business component data made by users in the application, changes which are made through the Object Manager. Therefore changes made directly to the data in the database would not be tracked by Siebel Audit Trail.
Siebel Audit Trail works through the business component layer. In the set up of Audit Trail, business components are specified to be audited operations to be tracked, and fields to be tracked.
The following operations can be tracked by Siebel Audit Trail:
7.Export Record (supported only in version 8 and above)