title: Microsoft Graph API CallRecord with expanded sessions returns an error
body: <p>When I execute a request for a specific callRecord like this it works:
  <code>https://graph.microsoft.com/v1.0/communications/callRecords/{id}</code></p>
  <p>But when I do this I get an error (500):
  <code>https://graph.microsoft.com/v1.0/communications/callRecords/{id}?$expand=sessions</code></p>
  <pre><code>{
      &quot;error&quot;: {
          &quot;code&quot;: &quot;InternalServerError&quot;,
          &quot;message&quot;: &quot;Object reference not set to an instance of an object.&quot;,
          &quot;innerError&quot;: {
              &quot;date&quot;: &quot;2022-04-14T12:21:34&quot;,
              &quot;request-id&quot;: &quot;{guid}&quot;,
              &quot;client-request-id&quot;: &quot;{guid}&quot;
          }
      }
  }
  </code></pre>
  <p>It looks like this doesn't happen for every callRecord though. We started seeing this error in our logging around 2022-04-11T00:24:00Z, now we get thousands of those.</p>