Precondition Failed error 412 when trying to post a message to chat using Microsoft Graph REST API

Question

Hi, we are using below Microsoft Graph API to send a message to the team's chat. But we are getting below error message.

POST End Point: https://graph.microsoft.com/beta/users/{user-id}/chats/{chat-id}/messages

{
    "error": {
        "code": "PreconditionFailed",
        "message": "Requested API is not supported in application-only context",
        "innerError": {
            "date": "<date>",
            "request-id": "<request-id>",
            "client-request-id": "<client-request-id>"
        }
    }
}

We also given all permissions for the application from the Azure end, by referring this thread https://learn.microsoft.com/en-us/answers/questions/506591/precondition-failed-error-412-when-trying-to-creat?comment=answer-507413&page=1#comment-1318025. Please help to resolve this issue. Thanks in advance.

Answer 1

Hi @Prakash

As your error message indicates, sending messages in chat does not support application-only contexts. So you must grant delegated permissions to your app and use the delegated authentication flow (auth code flow or ROPC flow) to obtain an access token.

Hope this helps.

If the reply is helpful, please click Accept Answer and kindly upvote it. If you have additional questions about this answer, please click Comment.