Document attaching with Procurement document and Invoicing also

Hello Experts,

The query is to attach document with PR/PO, Invoice etc.We don't have DMS implemented in our system and we don't want to save these documents in SAP . The aim is that the attachment should be attached to these documents but is should be saved in a repository outside SAP because these attachments contain >70 pages (>100 sometimes in case on Invoicing). How can we achieve it?

We have .Net and SharePoint in place. Can we use them for this purpose?

Or if there is some other workaround to achieve the same.

Thanks for four valuable suggestions.

Saurabh