Retro Scan is automatically disabled when you do any of the following:
            
               - 
                  
                  
Disable Web Reputation
                  
                  Optionally disable Web Reputation only if you use other security products to block
                     URLs or
                     use Deep Discovery Inspector specifically for
                     sandbox analysis.
                  
                  
                
               - 
                  
                  
Change Smart Protection source to a local Smart Protection server
                  
                  Retro Scan is based on queries to the web reputation technology in the Smart Protection
                     Network. Retro Scan cannot store and scan logs for queries to a local Smart Protection
                     server.