title: Find members email addresses of a mail group using Outlook/Office 365 REST API
body: <p>I want to get all the members of a mail group using Outlook/Office 365 REST API. </p>
  
  <p>For example: name: #allusers email: allusers@xyz.com </p>
  
  <p>I want list down all the members of the #allusers group.</p>
  
  <p>What is the API call would do this?</p>