Export the AAA logs to an existing remote syslog server.
In order to export the AAA logs to a remote syslog you must create an audit policy for the AAA authentication.
These are the steps required:
In the GUI, go to Configuration > Security > AAA - Aplication Traffic > Policies > Auditing > Syslog:
On the policies tab, click Add:
Select a name for the Auditing policy and choose the remote syslog server that you have previously defined and then click Create.