Forum Discussion

Copper Contributor

Feb 03, 2026

Issue with Teams 'Add a User to Group Chat' API call?

I am getting a very strange error when trying to add a new user to an existing group chat using a GraphQL call. I have looked through the documentation, asked AI, and even contacted Microsoft support...

Microsoft

Feb 05, 2026

Hello AutomatonSolutionsRDE,
The request fails due to two issues: first, the @odata.type value was misspelled, causing Microsoft Graph to stop processing and return a misleading schema error. Second, an incorrect property was used instead of user@odata.bind. Correcting both issues resolves the problem. The proper request body must include the correct @odata.type, roles array, and the user@odata.bind reference to the target user.

{

"@odata.type": "#microsoft.graph.aadUserConversationMember",

"roles": [],

"user@odata.bind": "https://graph.microsoft.com/v1.0/users('USER_ID')"

}

AutomatonSolutionsRDE

Copper Contributor

Feb 09, 2026

Sayali, this is not correct. Apologies that my initial report was not more clear. This is the exact API call being sent, as you can see; the issues you pointed out are not present in the actual API call. it's following the correct format.

Response body:

{"error":{"code":"BadRequest","message":"The provided '#microsoft.graph.aadUserConversationMember' for 'odata.type' is not valid for this operation.","innerError":{"date":"2026-01-29T14:56:25","request-id":"8ef444c8-64e3-45db-80d4-2c0ea9e47902","client-request-id":"8ef444c8-64e3-45db-80d4-2c0ea9e47902"}}}

PPlease advise.