Re: Enable Security Audit Logging on all SAP transactional systems (SM19/20)

Here you need to be more specific regarding the issues,Hope you searched SCN before asking as also suggested by Steve Rumsby.

Is it possible to enable Security Audit loging for a specific set of transactions or if all transactions need to be logged?

Addition to all you could also look for Authorization Trace in transaction ST01 - Product Lifecycle Management - SCN Wiki

System Trace - Tools for Monitoring the System - SAP Library

Hope this will help you .

Good luck !!