I have a requirement:
after the IT Service Help Desk starts a Teams Chat for a incident record, ServiceNow background should automatically send a message to the new created chat, sending more detailed incident information to the chat as shown in the image below.(Figure-1)
To meet this requirement, I created a Flow that calls the "Post message to Chat" action (Microsoft Teams Graph Spoke). In the Flow Designer's Connection Tab, I used one Microsoft Account to obtain a token for authentication in Microsoft Teams Graph Spoke and Microsoft Teams Spoke. (the validity period for Teams Spoke is only one hour).(Figure-2)
The result is that only when the incident caller is authentication user, be able to successfully run the flow after starting a Teams chat from the incident form/workspace, posting the message to the specific Chat Id. However, other users' incidents encounter the following error shown in Figure-3.
{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2024-03-06T19:07:05","request-id":"f2f9a60c-9fd7-4ab7-a5d7-d456888a0df5","client-request-id":"f2f9a60c-9fd7-4ab7-a5d7-d456888a0df5"}}}
Error: Access token is empty. Please Check Oauth Token and scope permission.
I'm not sure where the issue is. Could it be that my connection settings are incorrect, requiring the use of the login user to obtain a token each time? If so, how can I configure it to achieve it? Alternatively, could there be any restrictions on the "Post Message to Chat" Spoke Action?
Figure-1：
Figure-2 Connection Setting and Request Token
Figure-3 Flow Error in Post Message to Chat Action
Figure-4 permissions in Azure Portal
I referred to the following document：
