title: Get current call status of Microsoft Teams
body: <p>On my Windows PC, I've installed the Microsoft Teams app. I'd like to find out with an appropriate API whether I'm actually in a call and whether my microphone within a call is muted or not.</p>
  <p>So my questions are:</p>
  <ol>
  <li>How can I find out whether I'm currently in a call?</li>
  <li>What is the current microphone state within a call (muted / unmuted)?</li>
  </ol>
  <p>A little bit of background: I want to implement a little .NET Core service that polls for these information in the background.</p>