In "Audit mode", the sensitive files will be allowed to be transferred within and outside the enterprise perimeter. The enterprise perimeter defines the restrictions that the admin can configure to dictate the boundaries within which the sensitive data can be processed. However, only the files transferred outside the enterprise perimeter will be audited and can be viewed in the "DLP Sensitive Events Report". The report will give you insights on how to add/remove entries to your DLP Policy without affecting productivity. This applies to the policies of File Access, Email Client, File Upload, Removable Storage Devices, and Printing.