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AutomatonSolutionsRDE's avatar
AutomatonSolutionsRDE
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...
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Sayali-MSFT's avatar
Sayali-MSFT
Icon for Microsoft rankMicrosoft
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's avatar
AutomatonSolutionsRDE
Copper Contributor
Feb 10, 2026

Sayali, this is not correct. There's nothing wrong with my API call, it's following the exact format you would expect. You are looking at artifacts of my copy/paste, but the API call follows the exact format in the documentation. 

https://graph.microsoft.com/v1.0/chats/[[THREAD_ID]]/members

BODY: 

{

"chatType": "group",

"\u0040odata.type": "#microsoft.graph.aadUserConversationMember",

"user\u0040odata.bind": "https://graph.microsoft.com/v1.0/users/[[USER_ID]]",

"roles": []

}