I have a document library that has PDFs stored. I have the system to open in the client application. When I open the document, it opens in the PDF file. However, some users try to open it, it opens up in the browser.

I need for everyone to open these docs up in the application to be able to electronically sign the document. What am I missing?

  • And those users have the client installed and matched the application extension PDF to that client? Aug 4, 2017 at 20:44
  • Are they all using the same browser? Different browsers have different setups on what opens what and how by default.
    – Graham
    Aug 4, 2017 at 20:53

1 Answer 1


Try to make sure the following:

  • In your document library setting > Advanced setting, make sure that the Opening Documents in the Browser is set to Open in the client application.

  • Make sure that each user has Adobe PDF client application installed.

  • Make sure the web application Browser File Handling setting is set to Strict not Permissive in central administration > manage web application.

  • The last thing, remove the PDF extension from the allowed MIME type list by running the following:

    $webApp = Get-SPWebApplication("http://webappurl")

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