After fixing the main problem with IE11 where it would only run OWA light it seemed we had it all under control, but...
Whether RollUp3 for SP3 caused this error or if there is another bug that this roll up did not fix I do not know but... When our students (or me for that matter) use IE11 to go to options and try to set the automatic reply we get a blank screen below the top bar with the three buttons. Using IE10 or Firefox does not cause any problems, just using IE11.
Any one know if this is a "known problem" Microsoft is working on? Our students are using the Dutch language in OWA in case that may be relevant.
ps. Sory for posting this in the Exchange 2013 forum, it seems the interface only alows me to select Exchange 2013 fora.