Should you need a log of user administration operations (creation, deleting, editing, reviewing), or sending a mail on each such event, proceed as follows.

Sending mail on user administration operation

•You need to create a trigger on user editing, and attach a mail send to it.

•You need to create a workflow that will perform a search of the last changes made and then send a mail.

Retrieving audit

•You can create a search on audit for gn4:user object. It may be run by do.ashx, or by cmd4.

•You can create a report – GNQuery search.