Adobe Acrobat is set as the default program for PDF files to be opened. MS Edge Beta ignores this. I do not want PDF files to be opened in my browser, so in settings, I had selected "Always open PDF files externally." They are never opened externally. I get a dialog box telling me that I need to change my settings to open the files. The latest time, there was a download button. Sometimes there is not. I downloaded the file. At the bottom right of the screen, I am asked if I want to open the file. I click on it and get the dialog box that I have to change my settings in order to open the file. There is no way to open the file in Adobe Acrobat. This is my computer. It should do what I want. You need to fix it so that the user can open all files using the default programs they have chosen.
After you have downloaded the file, while it is still listed at the bottom of the screen, you can click on the [ ... ] to the right of the Open file link and select Always open with Adobe Acrobat Reader. This should open your PDFs in the Adobe Acrobat Reader from then on.
Best Response confirmed by
Tony_Stone (Occasional Contributor)