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Pass a file uploaded in Copilot Studio to a Power Automate flow as a File (not Record)?

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Posted on by AnonymousSC

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Hi everyone,

I’m building an agent in Copilot Studio with a topic where the user uploads a PDF file. User answer is saved into a File variable (PDF only).

I then call a Power Automate flow from the topic. The flow trigger is “When an agent calls a flow” and I want it to receive the uploaded file as input.

Problem: When I add the flow action in Copilot Studio (Topic), instead of asking me for a File, the action insists on a Record input. Even tho the trigger input in Power Automate is a File. How to fix this?

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Calling actions from Copilot Studio

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Sam_Fawzi 868 Super User 2026 Season 1 on at

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Hi @AnonymousSC,

Please read this https://learn.microsoft.com/en-us/microsoft-copilot-studio/guidance/pass-files-to-connectors .

Fix: pass the file as a Record { contentBytes, name }

In your Question node (where user uploads the PDF)

Entity = File

Turn on Include file metadata (important for name/content).

In Copilot Studio → Call your flow (Action node)
When it asks for the “Record”, don’t pass the File variable directly. Instead, build the record with Power Fx:

{ contentBytes: Topic.uploaded_file.Content, name: Topic.uploaded_file.Name }

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