Retraction – Copilot Studio: Upload File To MS Teams Video

Hey there folks. Matthew Devaney here.

This week I released a Youtube video about how to upload a file to MS Teams using Copilot Studio. Then two days later, I started hearing reports that my instructions were no longer working.

Thank you to everyone who let me know that this System variable had suddenly stopped appearing.

System.Activity.ChannelData.OriginalAttachments

I have no idea whether this is a bug, or a planned deprecation. But I do know that we all need a fix, fast.

So the first thing I’ve done is updated one of my June 2025 posts to Copilot Studio Easiest Way To Upload A File In The Chat Window. This will show you how to upload files through using a question node.

My next article, coming out Monday will show how to upload files from outside a topic (generative orchestration mode). In the meantime, there’s two code snippets I want to share.

This first code snippet will get you the name of a file:

First(System.Activity.Attachments).Name

And this code snippet will get you the file content. You can’t view this as a text string. But if you pass it to the file content property of a connector it will work

First(System.Activity.Attachments).Content

That’s all for now. Please watch for Monday’s article for more advice on how to use the Attachments table system variable and Copilot Studio’s generative orchestration mode.

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