CSS expressions no longer supported for the Internet zone
Starting with Internet Explorer 11, CSS expressions are no longer enabled for webpages loaded in the Internet zone. CSS expressions are supported for pages loaded in other zones (such as the intranet zone) when pages are rendered in IE7 standards mode or IE5 quirks mode.
For recent versions of Internet Explorer, CSS expressions (also called dynamic properties) are deprecated and work only in IE7 standards mode or IE5 quirks mode. (CSS expressions were deprecated in Internet Explorer 8.)
Starting with IE11, CSS expressions no longer work in any document mode for webpages loaded in the Internet zone.
Update affected pages to use features defined by modern standards, such as HTML5, CSS3, and others.