The most important thing in this day and age is to protect your data. The thing is, protection has to start from the inside. It does not necesarily have to be a nefarious action that causes problem, inocent actions and mistakes are the main cause of data loss. The modification of a file, the movement of a file, the accidental (or otherwise) deleting of an OU.
These changes can be tracked using native tools, but not easily or quickly, so what is needed is a third party tool to make this job easy and quick Enter Lepide Auditor Suite.
Ledpide Auditor Suite will show changes made to SQL, Exchange,Sharepoint and File servers plus any changes made within AD. Changes can be shown in realtime for fault finding and error correction and reports can be produced for compliance requirements as desired.
All this at a very reasonable price. Check out Lepide Auditor Suite here