File type association kills pdf view functionality in Internet Explorer 11

Expected behavior when hovering over a pdf file in IE11 is that the PDF is shown without a click. But in our environment, when previewing a Adobe Acrobat file in IE 11 on server 2012 r2, we got the following screen.

Untitled

If we want to Open, Save or Save As….

No, we don’t. We want a preview, as expected!

After investigating the issue, we found out that file type association kills the preview function. In our case, a Workspace Manager that manages the file type association  .PDF

The Workspace Manager replaces the file type assocation and manages which application and the order of applications associated. Disabling the application wasn’t enough, all the file type associations with .PDF had to be deleted before the preview function was back…

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