Send messages in Channel APIs we have added the Application permission even if added application permission we are unable send message in channel we are getting 401 Unauthorized response

Question

Application permission added these for this below api call:- Application permission (Teamwork.Migrate.All ,Chat.Send) is not availabe in our application permission account

send messages url:- https://graph.microsoft.com/v1.0/teams/{{team_id}}/channels/{{channel_id}}/messages
headers = {
'Authorization': 'Bearer Token',
'Content-Type': 'application/json'
}
Body request:{
"body":{
"content":"Hello World"
}
}

After providing above all information after sending request to APIs we are getting 401 Unauthorized
{
"error": {
"code": "Unauthorized",
"message": "Message POST is allowed in application-only context only for import purposes. Refer to https://learn.microsoft.com/microsoftteams/platform/graph-api/import-messages/import-external-messages-to-teams for more details.",
"innerError": {
"date": "2023-01-04T11:36:41",
"request-id": "65ea2672-0e88-4b69-af87-67b6cc172770",
"client-request-id": "65ea2672-0e88-4b69-af87-67b6cc172770"
}
}
}

Answer 1

Hi @Abdul Shuaib

You are getting this error because of Application permissions. As per the documentation, Application permissions are only supported for migration.
Otherwise, this API does not support Application permissions.

In case: your team is not in migration you need to use delegated permissions and I have tried this Graph API using delegated permissions, its working as expected. Please refer to the below sample screenshot

Hope this helps.

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Answer 2

Hi @Abdul Shuaib

As the documentation says, application permissions are only supported for migration. This means that your team and channel must both be created in a migrated state, otherwise you can only send chat messages in a delegated context.

Call this api endpoint in graph explorer:

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Answer 3

Hi @CarlZhao-MSFT
for send messages in channel endpoint as you suggested above comment auth code flow one I was tried that mechanism was not supported our platform and our higher authority disagree this flow
second one I have tried ROPC flow here I am getting error while access access token you could refer below snipshot image

above params I was passed as per documentation.
after sending request I was got these below respone

could please help us resloving these authentication issue, and if you are availabe could we have meeting abot this issue it would be better. if agree with meeting send me the your avaiblity date and time

thank you