Copilot New Experience Agent does not receive image files when uploaded in M365 copilot

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Posted on by ET-12060849-0

When I upload an image JPEG PNG etc, agent created with new experience says no files uploaded, did not receive in the upload directory. Yet it works perfectly fine in the preview tab in copilot studio. So is this a M365 copilot UI issue? File was not huge. Under 1 MB

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Haque 3,929 on at

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Hi @ET-12060849-0,

Microsoft 365 Copilot channel currently does not support passing uploaded image or file attachments to Copilot Studio agents in production, even though the UI allows uploading. This limitation causes agents to behave as if no files were uploaded.

To enable image/file processing with Copilot Studio agents, use supported channels like Teams or the Test your agent pane, and ensure file uploads are enabled in the agent’s Generative AI settings.

This is a confirmed platform limitation of the Microsoft 365 Copilot channel for custom agents, not a configuration or manifest issue.

Pleaes note that there is no published ETA or roadmap for fixing this limitation yet.

Reference:

File Uploads Not Passed to Custom Engine Agent

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Ashlesha-MSFT Microsoft Employee on at

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ET-12060849-0 We were unable to reproduce the issue. The same agent successfully received and analyzed uploaded images in both Copilot Studio Preview and Microsoft 365 Copilot.

Could you please try the following?

Start a new chat with the agent.

Refresh the Microsoft 365 Copilot page (or restart the Teams/Microsoft 365 app if using the desktop client).

Upload a small PNG or JPEG image again (under 1 MB).

Try using a different browser or an InPrivate/Incognito window to rule out cached session issues.

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ET-12060849-0 2 on at

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Thanks for the reply.

I shared with other Microsoft account, tried publishing with different copilot agent, republished, removed and added.

tried image with 30KB. All faced the same issues

When I tried in teams, it just says “sorry I can’t respond to that” if I upload an image.

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