Audit Log Reports in SharePoint 2013

You can use the audit Log Reports to view data in the audit logs for a site collection.With Audit Logs you can determine who deleted which content, Recently used documets in list or library and more..

Prerequisites -

Auditing must be enabled to use audit log reports in SharePoint Server 2013.

Auditing Events Recorded -

The audit log captures the following information for the events that are selected to be audited.

• Site from which an event originated
• Item ID, type, name, and location
• User ID associated with the event
• Event type, date, time, and source
• Action taken on the item

Trimming the audit logs -

When you select an event to be audited for a site collection, such as delete and restore, it will be audited for every item in the site collection each time the event occurs. Auditing can potentially generate a large number of audit events, creating a large audit log. This could fill the hard drive, affecting performance and other aspects of a site collection.

To prevent the audit log from filling the hard drive and potentially degrading the performance of the site collection, we recommended that you enable audit log trimming for site collections with extensive auditing

Note : If you are using SharePoint Online in Office 365 for enterprises, auditing for Opening or downloading documents, viewing items in lists, or viewing item properties is not available because of storage and performance concerns.