File download not working in Teams mobile app static tab (“This action is currently not supported on mobile”)

Question

I’ve created a React app that is integrated as a static tab in Microsoft Teams.
The app allows users to:

• Upload a file (.docx)
• Make changes to it directly in the app
• Then download the updated version of the file
• Download a file (.docx)

This functionality works perfectly in the Teams desktop app and web client, but when I try the same in the Teams mobile app (Android/iOS), it fails with the following message:

"Something went wrong: This action is currently not supported on mobile**"**

Answer 1

Hello Vishal Singh Thapa,

Thank you for posting in Microsoft Q&A Forum.

From your description, I can understand that your React app is integrated as a static tab inside Microsoft Teams, it allows you to download a .docx file which works fine on Teams desktop and web but fails on Team mobile app.

Microsoft Teams mobile apps block or ignore direct file download initiated from embedded web content within custom tabs. The HTLM <a download> attribute and similar mechanisms are not supported inside Teams ' mobile WebView

For your reference:

• Build tabs for Teams
• Embed a model-driven app as tab app in Teams (preview)

Here are some workarounds that you can kindly take:

1. Upload files to Teams and download from the Files tab:
   • Instead of directly downloading from the tab, upload the file into the channel of chat's Files section.
   • You can then open Teams > Files > Three dots > Download.
2. Open file in system browser:
   • Modify your link to open the file in the device's default browser:

      <a href="https://yourdomain.com/file.docx" target="_blank" rel="noopener noreferrer">Open in browser</a>
   

3. Detect Teams mobile and show alternate UI
   • Use Teams JavaScript SDK or user-agent detection:

      microsoftTeams.getContext(context => {  if (context.hostClientType === 'ios' || context.hostClientType === 'android') {    // show "Open in browser" message  } });
   

I hope it helps, please feel free to let me know if you need any further assistance.

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