拨打电话以创建呼叫API时未经授权401

Question

我已经使用创建通话图Api创建了通话

POST https://graph.microsoft.com/v1.0/communications/calls

Content-Type: application/json

{
  "@odata.type": "#microsoft.graph.call",
  "callbackUri": "https://myurl.com/callback",
  "targets": [
    {
      "@odata.type": "#microsoft.graph.invitationParticipantInfo",
      "identity": {
        "@odata.type": "#microsoft.graph.identitySet",
        "user": {
          "@odata.type": "#microsoft.graph.identity",
          "displayName": "xxx",
          "id": "112f7296-xxxx-42ca-bae8-6a692b15d4b8"
        }
      }
    }
  ],
  "requestedModalities": [
    "audio"
  ],
  "mediaConfig": {
    "@odata.type": "#microsoft.graph.serviceHostedMediaConfig"
  }
}

呼叫创建失败，有401个未经授权的响应，我也已授予权限。