Attachments in Shared Mailboxes won't open, preview or save.

Anonymous
2025-02-25T08:12:30+00:00

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?

Outlook | Windows | New Outlook for Windows | For home

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  1. Anonymous
    2025-02-26T15:01:06+00:00

    Im seeing 404 Error too and cannot find the post in admin portal. Have you any luck?

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  2. Anonymous
    2025-02-26T15:28:39+00:00

    Great find about not needing to actually forward the message. Thanks!

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  3. Anonymous
    2025-02-28T16:46:13+00:00

    Was this ever fixed? I have users still saying it won't work yet when i check service health i can't find the post for the issue

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  4. Anonymous
    2025-02-28T16:59:54+00:00

    It is still not working for me as of 12:00 on 2/28/25.

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  5. Anonymous
    2025-02-28T17:24:04+00:00

    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.

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