Outlook Attachments Won't Download: "Error, Try Again Later" Fix

Outlook attachments failing with "error, try again later" almost always traces back to one of two things: a Microsoft 365 service outage, or a local browser and app issue. Check Microsoft's service health page first. If it shows an active incident, stop troubleshooting your own machine and use the mobile app or OneDrive workaround below instead. If it shows no incident, the fixes further down get your attachments working again.

This exact error spread widely starting September 1, 2026, tied to a multi-day Microsoft 365 outage also hitting Exchange, SharePoint, Teams, and Copilot. Thousands of users reported the same symptom on Microsoft Q&A: PDFs, Word docs, Excel files, and images all refused to open or download, both in Outlook on the web and in the Windows app.

Is This a Microsoft Outage or a Problem on Your PC?

Check the Microsoft 365 Service Health dashboard before touching any settings. If Microsoft has an active incident logged for Exchange Online or Outlook, the attachment error stays out of your hands until Microsoft fixes it on their end.

Go to portal.office.com/servicehealth and sign in with your work or school account. Look for any incident with a status of "Service degradation" or "Service interruption" next to Exchange Online or Outlook. Admins also check the admin center under Health > Service health.

Without admin access, Microsoft's known issues page for new Outlook and outage tracking sites like Downdetector show a spike in reports when something this widespread happens. During the September 2026 Microsoft 365 outage, which also hit Exchange, SharePoint, and Teams, reports stayed elevated for several days before Microsoft marked the incident resolved. Patience mattered more than any local fix during those days. For Outlook sign-in trouble on top of the attachment error, see our guide to fixing recurring Outlook sign-in errors.

How Do You Get Your Attachment During a Known Outage?

Two paths work once the outage check above comes back positive: open the file through the Outlook mobile app, or save it straight to OneDrive from the message instead of downloading it locally.

Try the mobile app first. Open the same email on your phone in the Outlook app for iOS or Android. Mobile clients often route through different backend endpoints and caching layers than the web and desktop apps, so a file throwing an error on your PC frequently opens without issue on your phone. Tap the attachment, then use the share sheet to send it to yourself by AirDrop, email it to another account, or save it directly into a cloud folder reachable from your computer.

Save to OneDrive instead of downloading. On the email in Outlook on the web, open the attachment menu and look for "Save to OneDrive" rather than the direct download option. This saves a copy of the file into your OneDrive storage without routing through the same failing download path. Once it lands in OneDrive, open onedrive.com in your browser and grab the file from there.

Neither workaround fixes the root cause. Both get you the file while Microsoft works on the backend.

What If the Service Health Page Shows No Incident?

When Microsoft's status page is clear, the problem sits with your browser, your Office installation, or a security policy your organization has in place. Work through these steps in order, starting with whichever takes the least time.

For Outlook on the web:

• Open the mailbox in an InPrivate or Incognito window. If attachments download fine there, a browser extension is the culprit. Ad blockers, privacy tools, and download managers all intercept file requests and block Outlook's attachment fetch.
• Disable extensions one at a time in your normal browser window until downloads work again, rather than turning them all off permanently.
• Clear your browser cache and cookies for outlook.office.com, then sign back in.
• Try a second browser entirely. If Edge fails but Chrome works, the issue sits specific to the first browser's settings or an installed extension.

For the Windows desktop app (new Outlook or classic Outlook):

• Launch Outlook in safe mode by pressing Windows key + R, typing outlook.exe /safe, and pressing Enter. Safe mode disables add-ins. If attachments open in safe mode, an add-in caused the problem, and you disable add-ins one by one under File > Options > Add-ins until you find it.
• Run a Quick Repair on your Office installation. Go to Control Panel > Programs > Programs and Features, find Microsoft 365 or Office in the list, click Change, then choose Quick Repair. This fixes corrupted Office files without touching your email data.
• Right-click the Outlook shortcut and choose "Run as administrator" to rule out a permissions conflict on your PC.

If Outlook also shows "Working Offline" in the status bar alongside the attachment error, it's a separate issue with its own fix. See our guide on getting Outlook off Working Offline mode.

Is Your Organization's Security Blocking the File?

The error message tells you which situation applies. A generic "error, try again later" points to the outage or a local issue covered above. A message specifically saying "Download blocked" points to a Microsoft Purview Data Loss Prevention policy your IT department configured.

Purview DLP scans attachments before they leave the mail flow and blocks anything matching a policy your organization set, such as files containing what looks like a social security number, credit card data, or other sensitive information. Microsoft documents this behavior on its attachments can't be downloaded from Outlook Web App support page. For a "Download blocked" message specifically, contact your IT admin. They check the DLP policy match in the Microsoft Purview compliance portal and confirm whether the block is intentional or a false positive needing a policy adjustment.

What About Attachments in a Shared or Additional Mailbox?

If the error only happens in one shared or delegated mailbox while your primary mailbox downloads attachments fine, you're likely hitting a known OWA redirect bug rather than the outage or a local setting.

Opening a shared mailbox as an additional account inside your main Outlook on the web session sometimes triggers an HTTP redirect to a static Office 365 URL when you try to preview or download a file, instead of pulling the actual attachment. The workaround: sign into the mailbox directly rather than adding it as an extra account. Go to outlook.office.com, sign out, then sign back in using the shared mailbox's own credentials if you have them, or ask whoever manages the mailbox to check the attachment there.

Getting Back to Normal

Start every attachment problem with the Microsoft 365 Service Health check. It takes thirty seconds and tells you whether you're waiting on Microsoft or fixing something on your end. During an active outage like the one starting September 1, 2026, the mobile app and Save to OneDrive workarounds offer the fastest path to the file you need. Once the status page clears and attachments still fail, work through the browser and Office repair steps above in order, and loop in IT if the message specifically mentions a download block.

For new Outlook refusing to even launch on your PC rather than only failing on attachments, it's a different bug tied to a recent Windows update. Check our fix for new Outlook not opening on ARM PCs after KB5121003.