How can I enable or disable auditing for certain event classes? (4348939)

 If you're looking to disable certain audit event classes environment wide:

1. Open up the CA client as an administrator and go to the Administration tasks tab (View | Administration). 
2. Click on the Auditing blade in the lower left corner
3. Then go to "Audit Events" in the upper left corner.
4. In the right-hand pane, you should see a list of all audit events, you can use the filters or simply scroll to find the event classes that you want to disable.
5. Once you have found the appropriate event type, highlight it, then right-click and select disable.
6. Repeat as necessary for each event class that you wish to disable.

Shortly after that, all agents should receive an updated event list and they will no longer audit the event classes that you have disabled.