Embedded word files in Excel (Icons, links) not transmitting by Onedrive. Office 365 Limitation?

I am trying to share inserted objects -- Word and .pdf documents -- when coauthoring an Excel workbook online.   However, the workbook sent as an Excel Online through Sharepoint (Onedrive for Biz) does not share the objects embedded on the original document.  Is there a workaround for this problem other than to email the attachments separately?  Is this an MS 365 design limitation or am I doing something wrong?