Monitor who performs Searches using web console

Hello -

I have SourceOne 6.8...just the base one server.  We use the web console to perform searches as we don't need to perform many at all.  I was lookingto see if there was any logging of people who perform searches through the web console with Administrator permissions.  Basically there is a small group of about 5 accounts that have the ability to search across all mailboxes and I would like to be able to view logs periodically to make sure they aren't surfing through people's archives.

Thanks,

Jason Apt