Forum Discussion
Opening PDF attachments in Outlook to default PDF viewer
Let me try to get this thread back on track.
The 'New' Outlook has a great modern interface and there are several features that I like, however the one big showstopper that is preventing my employer from releasing this to the organization is the fact that you have to download all of your e-mail attachments. Right now, the user does not have the ability to open any attachments through their native desktop application; this includes PDF, Excel, Word or any other file type. The only option you have as a user is to preview the attachment within Outlook or save to your OneDrive. There are even some file types (i.e. xml) that are restricted and you can't even preview the file.
I navigated the to MS Roadmap site and I do not see this feature listed on the backlog. This should be considered a majority oversight by the product development team and should be addressed immediately.
Windows 11 Enterprise (22631.5335
'New' Outlook (1.2025.522.100)
And they still have not done anything about this. its disturbing to have to download everything that comes in because it cant be opened in a generic pdf viewer even if something else is chosen by default. I want to be able to use another pdf viewer besides adobe.
- Hornblower409Apr 25, 2026Iron Contributor
SBonilla wrote:
it cant be opened in a generic pdf viewer even if something else is chosen by default. I want to be able to use another pdf viewer besides adobe.
Not sure I understand. For me, using New Outlook for windows, if I right-click on a PDF attachment, or click the down-arrow, and choose "Open"
I get the standard File Open warning dialog and then it opens in Sumatra PDF, my Windows Default PDF viewer.
What is different for you? What PDF viewer do you have set as your Windows Default?