Power Platform Community Forum Thread Details

I’m working with Copilot Studio agents (including child agents) and trying to understand whether it’s possible to create or modify a Word file directly from a Copilot agent, without relying on Power Automate or external document APIs.
What I’m trying to do

Start from an existing Word document (SOW) stored in SharePoint
Update specific values only (pricing and dates)
Preserve all original formatting (fonts, styles, tables, headers, layout)
Return the updated document to the user as a downloadable file in the Copilot chat

What I’ve observed so far

Copilot agents (including child agents) can reason over content and return structured data (JSON, Base64, etc.)
However, attempts to:
- Generate a file directly from an agent, or
- Recreate a Word file from text/Base64 returned by an agent
  result in formatting changes or corrupted documents
The only reliable solution I’ve found is using Power Automate with Word/Graph-based actions, then returning the file via Respond to Copilot (File output)

My question
Is this limitation expected?
Specifically:

Are Copilot agents intentionally not designed to create or modify Office files directly?
Is there any supported way for a Copilot agent alone (without Power Automate) to:
- Create or modify a Word document
- Preserve 100% of formatting
- And return it as a downloadable file?

Or is Power Automate / Microsoft Graph / Word Online the only supported and recommended approach for file creation and modification in this scenario?

Any clarification on the design intent or roadmap would be really helpful.

Categories:

Building Copilot Studio chatbots in Microsoft Teams