I'm trying to open a PDF via the SharePoint mobile app but can only open it via the SharePoint App or via a web browser, this works fine with Excel files as it opens straight into Excel which I also have installed on my phone. I have two PDF viewers installed, Adobe Reader and PDF Expert, when I click "Open With" on the SharePoint app, nothing comes up.
I've tried changing settings in our sharepoint such as setting the default opening to ask the user.
