Hi Team
Per the Symantec_DLP_14.5_SharePoint_Quarantine_FlexResponse_Plug-in_Implementation_Guide ( pg 18) and the Symantec Data Loss Prevention 14.6 SharePoint Quarantine FlexResponse Plug-in Implementation Guide (pg 15) it's required that the quarantine site must be in the same site collection as the original site of the document.
The enhancement request it's to allow the Sharepoint Quarantine DLP Flexresponse to use a different site than the original site of the document.
It's our understanding that the Microsoft API for Sharepoint 2010 ( https://msdn.microsoft.com/en-us/library/office/websvccopy(v=office.14).aspx ) provides a Web Service called "Copy" that provides methods for copying files between SharePoint sites or within a SharePoint site.
Best Regards