MC1519841 - Microsoft OneNote: CSV and TSV references in Copilot Notebooks
Microsoft 365 Message Center announcement MC1519841.
MS Message Center's Summary
Microsoft OneNote now supports comma separated value and tab separated value files as knowledge sources in Copilot Notebooks. This update enables users to ground content generation in structured data across multiple platforms. The rollout began in mid October 2026 and concludes by late October 2026. Administrators should inform relevant teams about this capability and verify that existing data governance policies appropriately cover these file types within Copilot.
- Administrator impact
- No direct administrator action is required.
- End user impact
- Users can now reference structured data files directly within OneNote Copilot Notebooks to improve content generation.
- Importance
- 3/10: This is a new feature rollout that enhances functionality without requiring administrative configuration or causing disruption.
Microsoft Summary
Microsoft OneNote now supports using CSV and TSV files as knowledge sources in Copilot Notebooks, enhancing content generation with structured data. The feature is globally available since mid-October 2026, requires no user action, and automatically enables for tenants with existing CSV/TSV Copilot permissions.
- Message Center ID
- MC1519841
- Category
- stay Informed
- Severity
- normal
- Services
- Microsoft 365 apps, Microsoft Copilot (Microsoft 365)
- Tags
- New feature
- Roadmap ID
- 569210
- Platforms
- Android, Desktop, iOS, Web
- Published
- 2026-10-21
- Last updated
- 2026-10-21
- Expires
- 2026-12-04
[What and why] 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.