Internet Explorer 11 has some incompatibility issues with some websites. If the website is not being displayed as expected you can try the following:
1) Click on the “cog” on the right hand side of the browser toolbar
2) Select “compatibility View Settings”
3) If you are on the page that is being an issue you can click ok to the next screen. If not you need to add the website and then click ok. (Picture below)
If this does not work, please create a helpdesk ticket.