Summary
- Microsoft OneNote now supports CSV and TSV files as knowledge sources in Copilot Notebooks.
- This extends Copilot’s ability to ground generated content in structured tabular data alongside existing document sources.
- Affected organizations are those with Microsoft 365 Copilot and access to Copilot Notebooks in OneNote.
- The feature is enabled automatically for tenants that already allow Copilot to reason over CSV and TSV files.
- No admin configuration is required, but IT should inform users who work with structured data.
Primary Service: OneNote
Admin Impact: Low
User Impact: Medium
Release Start: 15 Oct 2026
Release End: 31 Oct 2026
Services: M365 Apps, M365 Copilot, OneNote
Category: Stay informed
Tags: New Feature
History
10/21/2026 Item Added to Message Center
Microsoft Message
We are introducing support for using CSV and TSV files as knowledge sources in Microsoft Copilot Notebooks. This enhancement allows users to add structured lists and tabular data directly to notebooks alongside existing document types. By including CSV and TSV content as reference material, Copilot can generate more relevant and informed outputs such as presentations, reports, briefs, and other content grounded in both structured and unstructured data.
Rollout schedule
- Public Preview (Worldwide): Rollout has completed.
- General Availability (Worldwide): Rollout began in mid-October 2026 and is expected to complete by late October 2026.
Impact on your organization
Who is affected
- Organizations with Microsoft 365 Copilot and access to Copilot Notebooks in OneNote.
- Users who work with CSV and TSV files as part of their Copilot workflows.
Platforms and services
- Microsoft OneNote
- Microsoft 365 Copilot
- Copilot Notebooks
What will happen
- Users will be able to add CSV and TSV files as knowledge sources in Copilot Notebooks.
- Copilot will use data contained in these files alongside other referenced content when generating responses and content.
- The feature will be enabled automatically for tenants that already allow Copilot to reason over CSV and TSV files. No additional configuration will be required.
Action required and recommendations
No action is required. We recommend that you notify users who work with structured data that they can reference CSV and TSV files directly within Copilot Notebooks once the feature becomes available.
Compliance considerations
No compliance considerations identified. Review as appropriate for your organization.