Error - Create peer-to-peer VoIP call with application hosted media

Question

I'm making Graph API call to Create peer-to-peer VoIP call with application hosted media,
and I get below error.

Request: { "@odata.type": "#microsoft.graph.call", "callbackUri": "http://2631306c61e9.ngrok.io/xxxx/xxxxx/notification", "source": { "@odata.type": "#microsoft.graph.participantInfo", "identity": { "@odata.type": "#microsoft.graph.identitySet", "application": { "@odata.type": "#microsoft.graph.identity", "id": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxx", "displayName": "<Full Name>" } } }, "targets": [ { "@odata.type": "#microsoft.graph.invitationParticipantInfo", "identity": { "@odata.type": "#microsoft.graph.identitySet", "user": { "@odata.type": "#microsoft.graph.identity", "displayName": "<Full Name>", "id": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxx" } } } ], "requestedModalities": ["Audio"], "mediaConfig": { "@odata.type": "#microsoft.graph.serviceHostedMediaConfig" }, "tenantId": "xxxxxxx-xxxxx-????" }

Referred: https://learn.microsoft.com/en-us/graph/api/application-post-calls?view=graph-rest-1.0&tabs=http

Even for empty JSON body as below, I do get this error without raising any BadRequest error.

POST /v1.0/communications/calls  
  
Content-Type: application/json  
Authorization: Bearer eyJ0eX????????  
  
{}  


{  
  "error": {  
    "code": "UnknownError",  
    "message": "{\"errorCode\":\"7503\",\"message\":\"Application is not registered in our store.\",\"instanceAnnotations\":[]}",  
    "innerError": {  
      "date": "2020-09-21T07:47:35",  
      "request-id": "db5022ae-94aa-48df-91fb-69171e38451c",  
      "client-request-id": "db5022ae-94aa-48df-91fb-69171e38451c"  
    }  
  }  
}  

Answer 1

You will need to register the calling bot (https://dev.botframework.com/bots/new).
https://learn.microsoft.com/en-us/microsoftteams/platform/bots/how-to/create-a-bot-for-teams#register-your-web-service-with-the-bot-framework

Answer 2

@Bharatha De Silva
I'm glad you were able to resolve your initial issue!

Looking into your question, Example 2 states - "a peer-to-peer call between the bot and the specified user". Additionally, at the top of the documentation it says - "Create call enables your bot to create a new outgoing peer-to-peer or group call..."

I've reached out to our engineering team for this and since this issue is a Teams related issue, I've added the correct tags. However, you might be able to get a faster response from our "Teams" team, by posting to their forum.

Thank you for your time!