How to Enable and Use Internet Explorer 11′s Enterprise Mode
 

Enterprise Mode is a new feature in Internet Explorer that allows businesses to use old web applications in modern versions of IE. This feature is designed to help businesses who still need Internet Explorer 8 for some reason to upgrade to a more modern, secure browser.

This feature is arriving in Internet Explorer 11 as part of Windows 8.1 Update 1, and will also be available as an update to IE 11 on Windows 7.

http://www.howtogeek.com/184634/how-...terprise-mode/