Unable to post message to Microsoft teams channel using Graph API

BASIL VARGHESE 1

showing error

{"Code: Unauthorized\r\nMessage: Unauthorized\r\nInner error:\r\n\tAdditionalData:\r\n\tdate: 2021-11-12T06:05:07\r\n\trequest-id: acb96a21-f65d-4718-bf59-f42eeadedf72\r\n\tclient-request-id: acb96a21-f65d-4718-bf59-f42eeadedf72\r\nClientRequestId: acb96a21-f65d-4718-bf59-f42eeadedf72\r\n"}

Sharon Zhao-MSFT 25,126 Reputation points Microsoft Vendor

2021-11-12T08:20:01.477+00:00

@BASIL VARGHESE ,

As we are mainly responsible for general quesetions of Microsoft Teams, it is not supported by us because your question is more related to Graph API. I will add office-teams-app-dev tag for this thread. Someone checking this tag will offer more assistances to you. Thanks for your patience and understanding.
Hunaid Hanfee-MSFT 981 Reputation points

2021-11-12T20:20:22.423+00:00

We are looking into the logs? Meanwhile, could you please confirm if you have added the proper permissions? Also are you using delegated or application flow?

Thanks
BASIL VARGHESE 1 Reputation point

2021-11-13T04:49:11.627+00:00

Given All permission to send message like Chatmessage.send
Hunaid Hanfee-MSFT 981 Reputation points

2021-11-15T08:58:01.803+00:00

Can you also confirm - are you using delegated or application flow?
BASIL VARGHESE 1 Reputation point

2021-11-15T10:55:05.5+00:00

Application Flow

I can do Create Teams , Create Channel etc..

But when sending message to channel it is showing Unauthorized

1 answer

Hunaid Hanfee-MSFT 981 Reputation points

2021-11-15T16:22:24.807+00:00

Hello @BASIL VARGHESE ,
It only allows to send message in channel when the team is in migration mode when using application permissions. Please see this doc to understand more - Import external messages to teams . It is also mention in the doc -
.
You can use this API only with delegated permissions as of now.

Thanks,

Hunaid L Hanfee

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Unable to post message to Microsoft teams channel using Graph API

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