InCopy Exporting Low-Quality PDF

I'm using InDesign to create a book and InCopy with a separate user so they can make edits.  When the other user tries to export a PDF from InCopy the photos and vector files are pixelated.  When I do it from InDeisgn they are fine.  Is there a way to adjust the settings in InCopy so they can export a PDF with high-quality images?