Microsoft 365 Copilot Chat API — General Availability timeline

The /beta/copilot/conversations/{conversationId}/chat endpoint remains in public preview, must not be used in production applications, and has no publicly announced General Availability date.

Current status and GA timeline

The endpoint reference explicitly identifies the operation as:

POST https://graph.microsoft.com/beta/copilot/conversations/{conversationId}/chat

It also states that /beta APIs are subject to change and that their use in production applications is not supported.^1^

Microsoft’s November 2025 platform update announced the Chat API as public preview, while announcing only the Retrieval API as generally available.^2^

No public GA date or target is stated in the API overview, endpoint reference, developer announcement, or current extensibility update page. Microsoft Graph also does not guarantee that a beta feature will be promoted to GA; when an API is ready, it is added to the current v1.0 version.^3^

Production support and SLA

For this particular endpoint, preview access does not mean production-supported preview:

• Production application use is explicitly unsupported.
• Breaking changes can be introduced without notice.
• The preview is provided “as-is,” “with all faults,” and “as available.”
• Microsoft provides no performance guarantee.
• The preview is not included in an SLA.
• It might not be covered by customer support.
• Microsoft can change the API or decide not to release a final commercial version.^4^

Consequently, a production architecture should not depend on this beta endpoint where availability commitments, API stability, or SLA-backed incident response are required. It can be used for evaluation, prototyping, and controlled testing under the preview terms.

The preview also currently requires users to have a Microsoft 365 Copilot add-on license; support for users without that license is unavailable.^5^

Official channels to monitor

Monitor these public sources:

1. Microsoft 365 Copilot extensibility “What’s new” — Microsoft identifies this page and the linked Microsoft 365 Copilot developer blog as sources for preview and GA announcements.^6^
2. AI at Work Roadmap — search for “Copilot Chat API” and related Microsoft 365 Copilot API entries.^7^
3. Microsoft 365 Copilot Developer Blog — this is where the public-preview status and API lifecycle updates have been announced.^2^

There is no confirmed roadmap item in the available public material specifically committing this endpoint to a GA date.

Requesting a product-team answer

For an authoritative answer tied to a production deployment:

1. Open Microsoft 365 Admin Center.
2. Select Help & Support.
3. Start with the Support Assistant, then open a Service request if your organization has a Premier/Unified Microsoft 365 support agreement.
4. Include:
   • The exact endpoint.
   • Tenant region and intended deployment date.
   • Required availability/SLA.
   • Expected request volume.
   • Whether GA timing blocks a purchasing or production decision.
   • A request for confirmation from the Microsoft 365 Copilot APIs product group.

Microsoft designates the Admin Center route for business-critical, SLA-based support. Microsoft Q&A remains the channel for general development questions, but forum participants cannot provide unpublished product timelines.^8^

References

1. copilotConversation: chat
2. Microsoft 365 Copilot APIs: What’s New and What’s Next
3. Versioning, support, and breaking change policies for Microsoft Graph
4. Microsoft 365 Copilot APIs Terms of Use (preview)
5. Overview of the Microsoft 365 Copilot Chat API (preview)
6. What's new in Microsoft 365 Copilot extensibility
7. AI at Work Roadmap - Microsoft 365
8. Support and feedback