Can't open Excel file within a PDF Portfolio
I created a Portfolio document using Acobat Adobe DC, it contains Word, Excel and PDF files. I was able to open them and edit, and save. However, after I send this file to others for review, none of us can open the Excel file with the Portfolio (no problem with Word and PDF). The error message is "can't open the file attachment because your PDF attachment setting do not allow this type of file to be opened". I tried and went to "edit"-preference - Trust Manager, the box of allowing open non-PDF files was checked. So I'm not sure what else I can do. The problem is I lost my work in the Excel file that I thought was saved within Portfolio, now it can't be opened or exported out. Please help.
