We are seeing weird issue where users are not able to open any office file from their mobile. They are trying to access them through SharePoint 2013 Intranet site which can be accessed through VPN.
Users can able to browse sites, but cannot open the office files and this is for entire farm.
When we open document the browser screen shows blank and sits in there and do nothing.
Not sure what changes caused this issue, it used to work fine properly.
I verified OWA server and it seems to be working fine. and I even changed library settings to "open document using client apps".