3 Replies
Matthew Bibby

What version of IE are they using? See here for details on which browsers are supported.

A common problem with IE is that it may be running in something called 'compatibility mode'. This means that they could have IE11 installed, but due to compatibility mode it is actually behaving like IE9 (but Storyline will think it is IE11... so will delivery the HTML5 output rather than the Flash output).