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Hello,
Across our company, people using the New Outlook for Windows are suffering the same issue with attachments not opening, previewing or allowing us to save, specifically .pdf file formats.
I've tried running an online Office 365 repair tool, I've also changed the default program for .pdfs from Adobe Reader to Edge on a hunch it was an issue with that. We're up to date on all Windows updates, and switching back to the Old Outlook works as normal.
The same issue occurs when trying to view the file with Outlook Online too.
Is there reported problems with this or a fix I can test/apply to a group please?
Using New Outlook on Windows for personal email, calendar, and contact management
Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.
After a little testing today, the effected mailboxes from my original post are starting to open PDF's again.
Could be that we're through this now?
Still waiting for the fix, but Outlook (classic) works as expected.
I am still having this issue today 02-28-2025; it is only affecting shared mailboxes so far and it seems like as each day has passed more of our shared mailboxes have been affected. I have been able to work around the issue either by forwarding the message to a user mailbox or by saving the file to Onedrive and then opening or downloading it from there.
It is still not working for me as of 12:00 on 2/28/25.