title: How do I tell what version of IIS and Windows my Azure App Service is running on
body: <p>I received an email from the Azure team that they were planning on upgrading the OS of Azure App Service to Windows 2016.  The only advice they gave was to try running on windows ten or Windows Server 2016 in preparation.</p>
  
  <p>My application started crashing in a new and unexpected way that might be explained by the OS being upgraded, but I would like to verify that it was in fact upgraded before pursuing anything further.</p>
  
  <p>I don't see an upgrade event in the logs and I can't seem to see any operating system version in the portal.  Is there somewhere else I should be looking?</p>