Graph API /chats/{chat_id}/messages Does Not Return M365 Copilot

Question

Graph API /chats/{chat_id}/messages Does Not Return M365 Copilot

fabian 0

Hi

I'm using the Microsoft Graph endpoint GET /chats/{chat_id}/messages to retrieve chat history. This works as expected for standard Teams chats (user and bot/app messages are returned). However, for Microsoft 365 Copilot conversations, the same call only returns the user-authored messages and none of the Copilot/bot/application responses.

Could you confirm whether Copilot responses are expected to be accessible via this endpoint, and if not, which API/permissions should be used to retrieve the full conversation history (including Copilot responses)?

Nivedipa-MSFT 4,251 Reputation points Microsoft External Staff Moderator

2026-01-16T05:59:57.1733333+00:00

Thanks for bringing this issue to our attention. We will check and update you soon.

1 answer

Your answer

Nivedipa-MSFT 4,251 Reputation points Microsoft External Staff Moderator

2026-01-16T05:59:57.1733333+00:00

Thanks for bringing this issue to our attention. We will check and update you soon.

Answer 1

Nivedipa-MSFT 4,251 Microsoft External Staff Moderator

Hello fabian,
Copilot-generated replies are not visible through the standard Graph endpoint GET /chats/{chat_id}/messages, as these messages aren’t stored or accessible like regular Teams chat or bot messages.

To retrieve Copilot responses, consider these options: 1. Copilot Activity Export API

Endpoint: GET /beta/copilot/users/{userId}/interactionHistory/getAllEnterpriseInteractions
This returns the full conversation history, including user prompts, Copilot replies, HTML content, metadata, and attachment references.
See aiInteractionHistory: getAllEnterpriseInteractions | Microsoft Learn

Copilot Chat API (for programmatic access)

You can create or continue conversations using: POST /beta/copilot/conversations GET /beta/copilot/conversations/{conversationId}/chats This allows you to interact with Copilot and retrieve response payloads as part of the Chat API
workflow.
See copilotConversation: chat | Microsoft LearnPOST /beta/copilot/conversations

Thanks,
Nivedipa

fabian 0 Reputation points

2026-01-16T14:03:25.91+00:00
Thanks for the reply, unfortunately, neither approach works on my side.

getAllEnterpriseInteractions filtering/ordering

When I try to filter by sessionId, I get this error:

“The entity property 'sessionId' and operationKind 'Equal' is not allowed in $filter query.”

This is unexpected because the documentation states that $filter is supported (see “Optional query parameters”): https://learn.microsoft.com/en-us/microsoft-365-copilot/extensibility/api/ai-services/interaction-export/aiinteractionhistory-getallenterpriseinteractions?pivots=graph-preview#optional-query-parameters

Additionally, ordering by date doesn’t appear to work either, and I don’t see any documented limitation for that. I’ve tried both /beta and /v1.0.

Could you confirm whether filtering by sessionId (and ordering by date) is actually supported? If not, which properties are supported for filtering/ordering, and is there a recommended way to retrieve interactions for a specific session?

Copilot Chat conversations endpoint

For Copilot Chat, I’m not seeing the “Copilot link” you mentioned; I assume you were referring to: https://learn.microsoft.com/en-us/microsoft-365-copilot/extensibility/api/ai-services/chat/copilotroot-post-conversations

Per your suggestion, I tried to fetch chats for an existing conversation using:

GET /beta/copilot/conversations/{conversationId}/chats

but I receive 405 Method Not Allowed, with:

“HTTP Method not allowed. Please use POST”

Could you clarify the correct method and endpoint to retrieve the chat/messages for an existing conversationId?

Any pointers toward a working end-to-end solution would be greatly appreciated.

Cheers,
fabian 0 Reputation points

2026-01-19T10:15:53.44+00:00

@Nivedipa-MSFT any news?
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Nivedipa-MSFT 4,251 Reputation points Microsoft External Staff Moderator

2026-01-29T03:54:11.7866667+00:00
Hello @fabian,

Is filtering by sessionId supported? No—not as a server‑side filter today. Use time/app filters + client‑side filtering.
https://learn.microsoft.com/en-us/microsoft-365-copilot/extensibility/api/ai-services/interaction-export/aiinteractionhistory-getallenterpriseinteractions?pivots=graph-v1

2. Is ordering by date supported? No—$orderby isn’t documented and doesn’t take effect; page only documents $top, date ranges, and $filter.

3. Which properties are filterable? Practically: createdDateTime (range) and app/workload class; sessionId is not. (Docs mention $filter with examples around app class; community examples show date ranges.)

4. Correct method/endpoint to get messages in an existing conversation? Use POST /beta/copilot/conversations/{conversationId}/chat (or chatOverStream). A GET to /chats is not supported (405 is expected).
https://learn.microsoft.com/en-us/microsoft-365-copilot/extensibility/api/ai-services/chat/copilotconversation-chat