title: Install old version via TestFlight
body: <p>For internal testing we want to install an old version on a device of someone who's UDID is not in the list. Via TestFlight I can add the email of this person in order for him to download the newest version (via internal testing), but I was wondering if it would be possible to enable him to download and install a specific old version?</p>
  
  <p>I've seen this page: <a href="https://stackoverflow.com/questions/11367315/how-to-install-previous-version-on-testflight">how to install previous version on TestFlight</a> but it is rather old and the suggestions are incorrect. </p>