Scanning multi page documents to individual pdfs.

Hello.

Am using Workcentre 7855 machines. I need to scan batches of multi page documents to pdf but need one pdf per document. 

Eg if I have ten x two page documents I want ten x two page pdfs to be produced. Seems simple enough. However all I seem to be able to do is produce one x twenty page pdf or twenty x single page pdfs.

Any solution to this?

Thanks