We have two web applications. One is still in 2010 mode and the other is 2013. One (2010) is an external facing web site and the other (2013) is internal.
Our prior SP admin had set search up to show PDFs in the preview pane in our 2013 web application. We had an issue with our OWA server where I had to disconnect/reconnect the OWA farm from SharePoint. When I did this it must have reset some thing because PDF previews stopped working in search. I checked the site collection and the search result type is there. I noticed that the binding (New-SPWOPIBinding) for pdfs to use the word app was missing, so I set it. The previews started working after a full crawl.
However, when I did this it also had the side effect of setting the 2010 web app to use the OWA word app to open PDFs, which wasn't the case before.
Anyone know how I can make it so PDFs can be previewed in search in one web app but not use OWA to open them in another web application? It seems to me the WOPI binding changes the whole farm.
I already looked at Wictor Wilen's site but that didn't help.