Hmmm. Are you in fact using the sourcetype already provided in the TAs referenced here? If so and still having problems it might be stronger to start a new question (feel free to cross reference this one) and provide greater detail.
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Peter,
I developed a report that runs each week, and sends me the reults fo the following search string:
index=_audit source=audittrail operation=edit action!=search action=edit_roles
You could modify this search with other parameters that suit your particular needs or frequency. The above, will show you all mods made to the admin role. I hope that helps. Thanks!
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