Outlook Web – Attachment preview & download fails ("The request could not be completed") while Save to OneDrive works

Dear Microsoft Support Team,

I am experiencing an issue with Outlook Web (outlook.com) on my account [******@hotmail.com].

Problem description:

• Image previews in emails and attachment previews fail to load on all emails, not just specific senders.
• Downloading attachments fails — both single file download and "Download all" — with the error: "The request could not be completed. Try again in a little while."
• The error occurs even on a plain image attachment (e.g., PNG files).
• "Save to OneDrive" works normally — I can save the attachment to OneDrive and download it from there without issues. This suggests the attachment files themselves are intact.

Environment & tests already performed:

• Browsers tested: Google Chrome [Version 154.0.8037.99], Chrome Incognito (no extensions) — same result on all.
• Sign out / sign in and browser restart: done, no change.
• Network tested on Wi-Fi home.
• Other accounts tested on the same browser: also cant load.
• Antivirus: -.

Steps to reproduce:

1. Open any email with an attachment in Outlook Web.
2. Click the attachment preview or the Download button.
3. Error message appears: "The request could not be completed. Try again in a little while."

Expected behavior: Attachment preview and download should work directly from Outlook Web.

Workaround currently used: Saving attachments to OneDrive first, then downloading from OneDrive. This works, but is impractical for daily use.

Microsoft Service Health shows all services operational, and I found similar reports from other users (September–October 2026) where the issue appeared account-specific and persisted across browsers/devices. Could you please investigate whether this is a service-side issue affecting attachment processing for my account?

Thank you for your assistance.

Best regards, [Bangkit Isnu Sirojjudin] [******@hotmail.com] [Versi OS, mis. Windows 10]