Microsoft 365 Attachment Issues

Microsoft currently have a service notice for email attachments not working reliably. Their current update is below:

Users may see the following error message when an attachment fails to download: “Error downloading the file content.” Downloading attachments and embedded image viewing may succeed after signing out and then back into Outlook on the web. If available, users can download attachments and view embedded images consistently through the Outlook desktop client or the Outlook mobile app.

To ensure our mitigation takes effect, users will need to logout and log back into their Outlook on the web accounts. This issue may impact those who are downloading attachments or viewing embedded images in Outlook on the web.

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