With IE10, I could add selected sites to Compatibility View via the registry with something like registry setting for IE's compatibility view settings to add a site?, so it was easy to push these settings out to my users. But with IE11, I haven't been able to figure out how to do it. I've done some tests and searched the registry but haven't been able to locate the correct key.
How do you add sites to Compatibility View with Internet Explorer 11?
Best Answer
To specifically address the issue mentioned by STGdb regarding Exchange OWA forcing light mode. There is a patch for Exchange server for this issue.
Can't load OWA Premium by using Internet Explorer 11 in an Exchange Server environment http://support.microsoft.com/kb/2866064