At MPOW we apparently have "compatibility mode" on by default by group policy. So this disables all the cool HTML5 and does weird things in general with a lot of web pages. If you go to the WordPress plugins, there are a few to show nasty messages to visitors that they have to change or update but that's just super unhelpful for those many visitors who don't actually have a choice.
Anyhoo... I pieced this together from a few different sites... If you go into network dashboard to themes to edit the theme and find the header.php file (back it up first just in case).
Then under <head> make the next line:
<meta http-equiv="X-UA-Compatible" content="IE=Edge,chrome=1">
and update... works. This tells IE not to show compatibility view.