I have a PDF that I shared on acrobat.adobe.com. It would appear that people within my company can view the PDF and add comments. But there are a couple people within another company that keep getting the error "The files have been remopved or you don't have access. Contact the docuement owner to request access"
I have I have sent them a link, and then sent I have also tried sending an invite to the pdf. Even though I send the invite, they get the same message.