With the SAP Jam SharePoint Plug-In, is there edit and upload capability?
SAP Jam Collaboration
Yes, upload capability of "SharePoint documents from SharePoint repositories" from SharePoint Connector to SAP Jam; however, edit not possible.
For more information regarding Jam and MS Sharepoint integration, you can refer to this Help link: Microsoft SharePoint integration
Edit Upload Jam SharePoint Integration , KBA , LOD-SF-JAM , SAP Jam , How To