How to Get Variables from Power Pages to Copilot Studio

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Posted on by AW-07050154-0

I have a power pages app that integrate local sign in. I also have an iframe embedded of copilot studio bot. Now, inside my bot I want to check whether the user already sign in or not. Can I send the user identity variables from power pages to copilot studio?

I've read this: Variables from Copilot Studio to Power Apps

It works for copilot studio -> power apps, but I want it in reverse.

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SaiRT14 1,990 Super User 2025 Season 2 on at

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Hi AW-07050154-0,

try window.postMessage() to send data from Power Pages to Copilot Studio iframe

Power Pages: After user signs in (or when page loads), use JavaScript to fetch their info (e.g., from Liquid variables or Dataverse) and send it to the bot iframe.

Copilot Studio Bot (inside iframe): Listen for the postMessage event and use a Power FX expression in a custom canvas or a custom event in Bot Framework Composer to set variables accordingly.

pls let me know if you need more details.

thanks

-Sai

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