Unable to Attach word Documents to Assignments

Hi @Nathanael O'Reilly,

Thank you for posting your question on Microsoft Q&A Community. We're happy to help you with your concern.

Based on your descriptions, here are some possible reasons why you're encountering the 'There was a problem attaching this file' error when submitting assignments in Microsoft Teams.

1. Permissions or SharePoint Sync issues
   • Each class in Teams is backed by a SharePoint site. If the SharePoint site has permission issues or is locked, file uploads may fail - even if settings appear identical across classes.
2. Corrupted or incompatible files
   • Even simple Word documents can trigger errors if they contain unsupported elements or metadata. Some users found that the issue follows the user, not the file or device.
3. Teams Client vs. Web App
   • Sometimes, the desktop app fails while the web version works. This suggests a client-side issue.
4. Storage quotas or site configuration
   • If the SharePoint or OneDrive storage quota is exceeded, uploads may silently fail.
5. Network or security software conflicts
   • VPNs, firewalls, or antivirus software can block uploads. Try disabling them temporarily to test.

You can try these suggestions to fix it:

1. Try Uploading via Teams Web

• Go to teams.microsoft.com
• Attempt the upload from the browser.
• If it works, the issue is likely with the desktop app.

2. Upload via SharePoint directly

• In Teams, go to the class > Files tab > click Open in SharePoint.
• Navigate to the folder for the assignment and upload the file there.
• Then attach it from SharePoint in the assignment.

3. Clear Cache or Reinstall Teams

• Clear Teams cache:
  • Quit Teams.
  • Delete contents of %appdata%\Microsoft\Teams\Cache.
• Or reinstall the Teams app.

4. Check storage quota

• Ask your admin to check if your OneDrive or SharePoint site has hit its storage limit.

5. Contact your IT/Admin

• Ask them to check Teams policies in the Microsoft Teams Admin Center.
• If no policy is causing it, they should open a support ticket via the Microsoft 365 Admin Center.
• Ticket Support: In the Microsoft 365 Admin Center>Support>Help & Support. You can raise support ticket at https://admin.microsoft.com/#/support/requests   

If you need any further assistance, feel free to reach out. We're here to help. Thank you very much for your understanding and your cooperation.

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Hi @Nathanael O'Reilly,

Hope things are running smoothly on your end.

Following up on the support thread we've been working on. I hope the information I shared in my previous answer resolve the issue you were facing. If you are still facing the same issue or need assistance with anything else, kindly respond to this email, and I will be happy to help.

We want to make sure everything is working as expected and that your experience remains uninterrupted.

Thank you for your patience and understanding throughout the troubleshooting process. 

I look forward to hearing from you soon.

Hi @Nathanael O'Reilly,

I hope you are having a great day.

I'm reaching out again to follow up on your issue and check if everything has been resolved. My goal is to ensure your experience remains smooth and hassle-free. If you're still encountering any problems or have run into new challenges, please let me know which steps you're currently stuck on and happy to provide further help whenever you need it. 

If you have any further questions, feel free to tag me in your reply so I can assist you directly.

Looking forward to your update.