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Copilot Not Working

Can Microsoft Copilot Attach Files Larger Than 1 MB?

Huma Ashraf ChHuma Ashraf Ch Sep 28, 2026 869 views

Question details

The user wants to know if Microsoft Copilot supports uploading files larger than 1 MB, as they are currently facing a file-size limitation.

Can Microsoft Copilot Attach Files Larger Than 1 MB?
Product
Microsoft Copilot
Device & OS
not provided
Scenario
Uploading attachments or documents for Copilot to analyze and process.
Observed behavior
Files larger than 1 MB fail to attach or are restricted for users, even with a Business A5 license.
Before you start

Ensure your Microsoft Copilot subscription is active and verify your network connection before attempting to upload large files.

Solution 1Recommended

Report the File Size Limitation via Copilot Feedback

Use the built-in feedback tool to notify Microsoft about the 1 MB file upload restriction and request clarification.

Microsoft Copilot relies heavily on user feedback to adjust its features and capacity limitations. If you are hitting a 1 MB limit, reporting it directly from the interface ensures the development team is aware of the restriction impacting Business A5 users.

1
Open Microsoft Copilot

Launch Microsoft Copilot from your web browser or dedicated desktop application.

2
Locate the feedback tool

Look for the feedback icon (usually represented by a thumbs up/down icon or a dedicated feedback button) in the Copilot interface.

3
Submit your report

Explain that your Business A5 license restricts file attachments to 1 MB, ask if larger uploads are supported, and submit the feedback.

Report the File Size Limitation via Copilot Feedback
Feedback Processing: While feedback goes directly to Microsoft, it may take time for them to respond or roll out an update that increases the file size limit.
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  1. 1. Download WPS Office: Install WPS Office from the official website and launch the application.
  2. 2. Open Your Large Document: Open your large Word document or PDF directly in WPS Writer or WPS PDF.
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Frequently Asked Questions

Why can't I upload files larger than 1 MB in Microsoft Copilot?

Certain Microsoft Copilot deployment environments or specific tenant policies may impose strict file size limits to optimize AI processing and server load. You can report this via the feedback tool to request an expansion.

Does upgrading my Microsoft license fix the 1 MB attachment limit?

Not necessarily. Even premium licenses like Business A5 may face unexpected limits due to regional restrictions or current software builds. It is recommended to post in the Microsoft Copilot Q&A forum to see if it is a known bug.

What types of files can I attach to Microsoft Copilot?

Generally, Copilot accepts common document formats like DOCX, PDF, and PPTX. However, successful uploads depend entirely on your current tenant settings and the platform's active file size restrictions.