There’s a quick fix available when your Web Apps are not working on Exchange 2013 OWA when it’s installed on Windows 2012 or Windows 2012 R2. If your Web Apps show this behaviour: Then here’s a quick fix: On your Exchange 2013 Frontend server find the “<exchange>FrontEnd\HttpProxy\owa” folder and open web.config in notepad. Find “<appSettings>” … Continue reading Fix for Exchange 2013 OWA Web Apps not working