I have shared a pdf file using tonido. It works just fine on my iPhone and iPad, but when I try to open the link using Internet Explorer, it doesn't work. If I copy and paste the link it will sometimes work, but not always.
I would think that it is just something in my settings, but others that I have shared the link with are having similar issues?
Does anyone have any idea what I need to do to make this work?

Have you tried a different browser? could you PM me a link to a shared file?

PDF files as links in many browsers are handled by their open pdf behavior.
Sometimes they will be saved locally, sometimes opened inline.
If PDF reader doesn't exist, then they will not even open.

What I suggest is to create a shared link to a folder in which the PDFs are present and then share that folder. Users can download the pdfs from the folder and do what they want. It will be uniform.

ok Thanks!