Can Microsoft Copilot Attach Files Larger Than 1 MB?
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.

- 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.
Ensure your Microsoft Copilot subscription is active and verify your network connection before attempting to upload large files.
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.
Launch Microsoft Copilot from your web browser or dedicated desktop application.
Look for the feedback icon (usually represented by a thumbs up/down icon or a dedicated feedback button) in the Copilot interface.
Explain that your Business A5 license restricts file attachments to 1 MB, ask if larger uploads are supported, and submit the feedback.

Consult Specialized Microsoft Support Q&A
Seek official assistance directly from Microsoft experts regarding Copilot attachment limits.
Experience Powerful AI Document Analysis with WPS Office
If you are struggling with attachment limits in Microsoft Copilot, WPS Office provides a lightweight, highly compatible alternative. With built-in WPS AI, you can seamlessly open, analyze, summarize, and rewrite large documents directly within the application without relying on strict web-upload limitations.
- 1. Download WPS Office: Install WPS Office from the official website and launch the application.
- 2. Open Your Large Document: Open your large Word document or PDF directly in WPS Writer or WPS PDF.
- 3. Activate WPS AI: Click on the WPS AI button in the top toolbar to start summarizing, proofreading, or analyzing your extensive text locally.

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.




