title: Microsoft Graph - Find the original message in email chain
body: <p>I am not sure if this is possible but is there a way to find the very first email message in an email chain?</p>
  <p>For example, if there are 3 messages in email chain (1 original and 2 reply messages), I would like to find the very first original email.</p>
  <p>I thought by filtering the messges by conversationid but that did not work.</p>
  <p>Any help much appreciated!!!</p>