graph.microsoft.com Chats: The caller must be one of the members specified in request body.

Question

could someone help me please?
I'm trying to create a chat

the user ID are 100% correct
I can create a chat for myself but not for other users in my organization

Post https://graph.microsoft.com/v1.0/chats
{
"chatType": "group",
"topic": "Group chat title",
"members": [
{
"@odata.type": "#microsoft.graph.aadUserConversationMember",
"roles": [
"owner"
],
"user@odata.bind": "https://graph.microsoft.com/v1.0/users('127e960d-139e...............')"
},
{
"@odata.type": "#microsoft.graph.aadUserConversationMember",
"roles": [
"owner"
],
"user@odata.bind": "https://graph.microsoft.com/v1.0/users('eaf991f3............................')"
}
]
}

Response:
Bad Request - 400 - 99ms
{
"error": {
"code": "BadRequest",
"message": "The caller must be one of the members specified in request body.",
"innerError": {
"date": "2021-11-02T12:48:02",
"request-id": "f32df772-.................................",
"client-request-id": "35cd9bb2-d.................."
}
}

Answer 1

For more visibility, adding the answer from the comment section.

@Wilhelm Schmidt - In members property you have to include your user id also.
For members property description-List of conversation members that should be added. Every single user, including the user initiating the create request, who will participate in the chat must be specified in this list.

Thanks,
Chetan Sharma

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