❓ Can't remove member from Microsoft Teams Group Chat using Graph API with Application Permission

Hi everyone,

I’m currently working on creating a Teams group chat using Microsoft Graph API with application permissions, and I’ve run into several issues that I hope someone here can help clarify.

Creating group chat with members and installed app (works)

I followed the documentation here:
“Create a one-on-one chat with installed apps”
➜ https://learn.microsoft.com/en-us/graph/api/chat-post?view=graph-rest-1.0&tabs=http#example-3-create-a-one-on-one-chat-with-installed-apps

Using application permissions, I successfully:

- Created a group chat

- Added multiple members

- Installed my Teams app into the chat automatically

My application has already been granted the following permissions:

ChatMember.ReadWrite.All  
ChatMember.ReadWrite.WhereInstalled

The purpose is to allow the app to add or remove chat members without requiring a signed-in user, since I am using fully non-delegated application permissions.

However, when I try to remove a member from the group chat using Graph API with the application token, the request fails and returns an error.

Trying RSC-granted approach – app not installed

Next, I tried creating a group chat using the RSC-granted app approach:

https://learn.microsoft.com/en-us/graph/api/chat-post?view=graph-rest-1.0&tabs=http#example-4-create-a-one-on-one-chat-with-rsc-granted-apps

With the following permission:

- ChatMember.ReadWrite.All

And permission type: application

The group chat is created successfully, but the app is not installed inside the chat, which means I still can’t proceed with removing a member using the app context.

So this solution also stops midway.

Creating chat first, then installing the app (also fails)

Lastly, I attempted another method:

Create the group chat normally

After creation, install the app into it using this endpoint:
https://learn.microsoft.com/en-us/graph/api/chat-post-installedapps?view=graph-rest-1.0&tabs=http

I used an application access token again, but the request returns the same error as case #1 when attempting to remove a member.