Graph API: I cant create a call peer to peer

[mpaludi00]

Hi All! I am trying to create a peer-to-peer call with the /communications/calls api using the following request:

{
  "@odata.type": "#microsoft.graph.call",
  "callbackUri": "https://my-endpoint.com/endpoint",
  "source": {
        "@odata.type": "#microsoft.graph.participantInfo",
        "identity": {
            "@odata.type": "#microsoft.graph.identitySet",
            "user": {
                "@odata.type": "#microsoft.graph.identity",
                "displayName": "User0",
                "id": "xxx-xxxx-xxxx-xxxx",
                "tenantId": "asd-asd-asd-asd"
            }
        }
    },
  "targets": [
    {
      "identity": {
        "user": {
          "displayName": "User1",
          "id": "xxx-xxx-xxx-xxx",
          "tenantId": "asd-asd-asd-asd"
        }
      }
    }
  ],
  "requestedModalities": [
    "audio"
  ],
 "mediaConfig": {
    "@odata.type": "#microsoft.graph.serviceHostedMediaConfig"
  },
  "tenantId": "asd-asd-asd-asd"
}

But I am getting the next error:

{
    "error": {
        "code": "7507",
        "message": "Call source identity invalid.",
        "innerError": {
            "date": "2022-07-20T11:27:45",
            "request-id": "23e7b220-f593-4fdf-baac-25acd435c92e",
            "client-request-id": "23e7b220-f593-4fdf-baac-25acd435c92e"
        }
    }
}

The documentation says that peer to peer calls are supported.

What could be happening?

Thanks in advance.

[#2]

@mpaludi00 -

Please verify if the ApplicationId in teams app instance has the same ApplicationId from your bot registered in Bot Services:

Using teams powershell module: Get-CSOnlineApplicationInstance

or update it using Set-CsOnlineApplicationInstance -ApplicationId <AppId from bot>

Also, make sure that the applicationInstance.Id in the request body is the applicationInstance.objectId from teams application instance.

Thanks, 

Prasad Das

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[#3]

The application id is the same in both places (Bot and My App on azure).
Regarding your last suggestion about the applicationInstance.Id , I am not passing that argument as a source, as I want the source to be a user.

What I need is to generate a peer-to-peer but not have the bot start it, otherwise it creates a conference. Is that possible? @Prasad_Das-MSFT 

Thanks for the quick response, I hope you can continue to help me.

[#4]

@mpaludi00 - Please refer: Create call - Microsoft Graph beta | Microsoft Docs