Default PDF Viewer

Question

PDFs in Edge do not permit functionality. How do I set the default program to open PDFs to Adobe Acrobat in Office 365 for Business? These browser programs suck.

Answer 1

To make Adobe Acrobat the default app for opening PDFs instead of Microsoft Edge on Windows 11 (including Office 365 for Business scenarios), change the default file association for .pdf files:

1. Install Adobe Acrobat or Adobe Acrobat Reader if not already installed.
2. Open Settings from the Start menu.
3. Go to Apps > Default apps.
4. In the search box, type .pdf.
5. Select the current default app shown for .pdf (likely Microsoft Edge).
6. In the How do you want to open .pdf files? dialog, choose Adobe Acrobat or Adobe Acrobat Reader.
7. Select OK (or Set default) to confirm.

After this change, double-clicking PDF files from File Explorer, Outlook, or Office apps will open them in Adobe Acrobat instead of Edge. If a PDF still opens in Edge from within the browser, download it first, then open from File Explorer so the default association is honored.

If an organization wants Edge to remain default for other content but not for PDFs, admins can also configure the AlwaysOpenPdfExternally policy so Edge treats PDFs as downloads and opens them with the system’s default PDF application.

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References:

• AlwaysOpenPdfExternally
• Set Microsoft Edge as the default browser
• Troubleshoot when you can't insert a PDF Printout in Class Notebook