Unable to access files in teams and channels

Hi @Krista Wagner, 

Thank you for posting your question in the Microsoft Q&A forum.  

The issue that you’re facing is that files in your Microsoft Teams channels aren’t opening or loading, which is preventing you from getting to the documents you need for work.  

File access in Teams depends on your membership and permissions in the team, how the channel connects to its SharePoint library, and the health of the Teams app on your device. When any of these elements is misconfigured or the client cache is out of date, the Files tab can fail even though the same files remain reachable in SharePoint. 

Below are some workarounds that you can follow 

1/ Begin by validating your membership and reviewing assigned permissions. 

• Open Microsoft Teams, go to the affected team, select Manage team, and review Members.

• Ensure your account is listed and has the expected role.  
• If no active owner is present for the team, ask your Microsoft 365 administrator to assign an owner to the Microsoft 365 group behind the team. 

This restores the ownership information that the Files tab relies on. 

2/ Then, select ‘Open in SharePoint’ to confirm accessibility. 

• In the channel, select Files, then choose Open in SharePoint.  
• If the files open correctly in SharePoint, your library permissions are intact and the issue is likely within the Teams client.  
• Keep this SharePoint path available as a temporary way to work while you continue the next steps. 

3/ After that, refresh the Teams client and clear the cache. 

• Close Teams completely. 
• On Windows: %userprofile%\appdata\local\Packages\MSTeams_8wekyb3d8bbwe\LocalCache\Microsoft\MSTeams
• On macOS: rm -rf ~/Library/Group Containers/UBF8T346G9.com.microsoft.teams 

rm -rf ~/Library/Containers/com.microsoft.teams2

• Reopen Teams and sign in, then select Settings and check for updates.  

A clean cache and current client version helps the Files tab load correctly. 

4/ Since your account is managed by your university, only your university’s IT department has the necessary permissions to help check your permissions with your account.    

If you don't know who your IT administrator is, I recommend the following:    

• Asking your teacher. 
• Contact your institution's academic affairs office. They should be able to direct you to the right IT contact.      

Proceed by checking policy configurations in the Microsoft 365 admin center. 

• Ask your IT's admin to run the Teams Files Access diagnostic in the Microsoft 365 Admin Center.  

This automated check verifies ownership, permissions, and configuration for the team and channel, and it can apply fixes when a misconfiguration is detected. 

• Confirm the account has a license that includes SharePoint and OneDrive. 
• Review Conditional Access, network proxy, VPN, or device compliance rules that might block SharePoint. 

Please understand that our initial response does not always resolve the issue immediately. However, with your help and more detailed information, we can work together to find a solution.   

I hope this information is helpful. Please follow these steps and let me know if it works for you. If not, we can work together to resolve this.    

Thank you for your patience and your understanding. If you have any questions or need further assistance, please feel free to share them in the comments on this post so I can continue to support you. 

I look forward to continuing the conversation.

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