http://technet.microsoft.com/en-us/library/jj219455(v=office.15).aspx We have followed the TechNet article carefully and we have been successful, however, Office documents do not open in OWA.
I get the error "sorry we couldn't open this presentation because we run into a problem, please try again", same with Word, slightly different with Excel.
Our server names are set as External-https. Our SP configuration part has been exactly like described by the TechNet article. The binding is successful (and it does say external-https) and the SPWOPI has been changed to external-https.
We run out of ideas. Can anybody help?