How to Fix Excel Files Loading Slowly in Microsoft Teams Free
Question details
User experiences long wait times when attempting to open small, minimally formatted Excel files within the Microsoft Teams Free application.

- Product
- Microsoft Teams / Microsoft Excel
- Device & OS
- not provided
- Scenario
- Opening and viewing shared Excel spreadsheets directly within the Microsoft Teams Free desktop or web interface using a Microsoft 365 Family subscription.
- Observed behavior
- Excel files load significantly slower than expected, likely due to differences in background storage architecture between personal OneDrive and business SharePoint accounts.
Verify that your internet connection is stable and ensure your Microsoft Teams application is updated to the latest version before troubleshooting.
Open the Excel File in the Desktop Application
Bypass the built-in Microsoft Teams viewer to leverage the full processing power of your local desktop Excel application, avoiding cloud-viewer latency.
Microsoft Teams Free relies on personal OneDrive storage architecture rather than SharePoint, which can sometimes cause the in-app file viewer to buffer. Opening the file directly in your desktop application eliminates this bottleneck.
Navigate to the chat or channel where the slow-loading Excel file is shared.
Hover over the Excel file message and click the 'More attachment options' (three dots) icon next to the file name.
Click 'Open' from the dropdown menu, then select 'Open in app'. This will launch your local spreadsheet software instead of the Teams viewer.

Access the File Directly from OneDrive
Identify if the loading delay is caused by the Teams application itself or an underlying OneDrive synchronization issue.
Clear the Microsoft Teams Cache
Remove temporary application data that might be corrupted and causing sluggish performance when loading documents.
Experience Faster Spreadsheet Loading with WPS Office
If cloud synchronization delays in Microsoft Teams and Office 365 are slowing down your workflow, WPS Office offers a lightning-fast, lightweight alternative. Enjoy instant file loading without relying on complex cloud architectures, while maintaining perfect compatibility with your team's files.
- 1. Download WPS Office: Get the free installer from the official WPS Office website and complete the quick installation.
- 2. Download your Teams file: Save the slow-loading Excel file from Microsoft Teams to your local hard drive.
- 3. Open instantly: Right-click the downloaded file, select 'Open with', and choose WPS Spreadsheets for immediate access.

Frequently Asked Questions
Why do Excel files load differently in Teams Free vs Teams for Business?
Teams for Business accounts integrate with SharePoint, which is optimized for enterprise file sharing and collaboration. Teams Free utilizes personal OneDrive storage, which has a different background architecture that can sometimes result in slower loading times for shared documents.
Does file size or formatting impact loading times in Microsoft Teams?
Yes. Even if a file has minimal formatting, a large file size, extensive version history, or embedded complex formulas can cause the in-app Teams viewer to buffer. Downloading the file and opening it locally usually resolves this.
How can I stop Teams from opening Excel files in the built-in viewer?
You can change your default settings. In Teams, go to Settings > Files and links. Under 'File open preference', change the setting from 'Teams' to 'Desktop app'. This ensures all future Excel files open directly in your local spreadsheet software.




