microsoft-graph-api - microsoft graph api - 无法创建邮件订阅错误：ServiceUnavailable

Question

当我们尝试使用电子邮件帐户创建电子邮件订阅时，我们收到了 ServiceUnavailable 错误。

POST https://graph.microsoft.com/v1.0/subscriptions

Body: {
   "changeType": "created",
   "notificationUrl": "***********************",
   "resource": "me/messages",
   "expirationDateTime":"2019-09-11T18:23:45.9356913Z",
   "clientState": "****"
}

回应是

{
    "error":{
        "code": "ExtensionError",
        "message": "Operation: Create; Exception: [Status Code: ServiceUnavailable; Reason: Target resource '0003bffd-d62b-a260-0000-000000000000' hosted on database '8cea8e2c-3c39-469c-a9e7-3f0bed47d869' is currently on backend 'Unknown']",
        "innerError":{
        "request-id": "972e7800-541e-41f9-8792-069ecd564345",
        "date": "2019-09-09T23:30:13"
        }
    }
}

这种错误的原因可能是什么？

标签： microsoft-graph-api