title: Office365 Unified API, get calendar ID from Events ID
body: <p>Every Event belongs to a Calendar, so when I receive a webhook from Outlook API management about a calendar event, I expect to also receive the container ID of this Events, but no. I get very little information about this calendar event, but still there is an ID. The problem how to get the ID of the calendar itself that holds this event?</p>
  
  <p>I use unified API for querying this, and all I get so far is</p>
  
  <pre><code>GET https://graph.microsoft.com/beta/me/Events/&lt; ID &gt;
  </code></pre>
  
  <p>But guess what, nowhere inside this response do I find the calendar ID. &lt; sick ></p>
  
  <p>Can anyone tell me how to retrieve the calendar ID from an Event ID?</p>