title: Why does Microsoft Edge (formerly Project Spartan) prompt to open this website in Internet Explorer?
body: <p>Does anyone know what triggers MS Edge to not open a specific web page/site, but instead prompt the user to open the site in internet explorer?</p>
  <p>The message says:</p>
  <blockquote>
  <p>This website needs Internet Explorer</p>
  <p>This website uses technology that will work best in Internet Explorer.</p>
  <p>It is not possible to proceed using Project Spartan.</p>
  </blockquote>