Hi! I have two users working from their personal (work) Google drive. When either of them open a non-Google document (ex, a pdf file) and try to share it, they can't because the share button is greyed out. Backing up into the folder where the pdf is stored, they are able to click on the ellipsis and click on Share from there. They previously were able to share straight from the document. Any insight as to why they can't share any longer directly from the pdf?