Detect malware and threats that are residing with files stored in these mediums to ensure complete protection.
Once a file becomes infected in Network Attached Storage or SharePoint you effectively end up with a malware propagation engine that will freely migrate out of the store from time to time; maybe affecting customers or your key production systems, and although you may be able to clean up the effects, you will still be left with the root malware hiding in your NAS or SharePoint systems.
Detect malware as it transferred to/from your website but before it can reside and be processed on your business critical systems: A typical usage scenarios include scanning file transfers originated by your customers to your website. Your policy maybe to scan all file at the perimeter before such files reach your network systems.
Symantec Protection Engine for Web Services would intercept the file as it is being passed to your site, but before it is stored, scan for malware and threats and block and/ or alert accordingly.
Opinion & Resources
MS Exchange, SharePoint, Network Attached Storage and Web file transfers all allow executable files to be stored and processed, and cannot be scanned by standard antivirus software. This makes these mediums the perfect places for malicious threats to hide within the network and elude perimeter detection, even if the malware is detected by a desktop or server antivirus during file transfer the root cause of the infection will not be neutralised.Nigel Lewis