Environment: Exchange 2013 CU3 / Office Web Apps Server 2013
OS: Windows Server 2012 R2
After implementing Office Web Apps server per the Integration with Exchange 2013 instructions, attachment previews in OWA show up as blank windows. The pop up says Opening your mailbox, then goes blank. I have the WAC endpoint configured in Exchange, I can access the discovery URL from the Exchange servers, and I am seeing event 142. Some forums say that these events should be in the CAS application logs. I am seeing mine in the Mailbox server app logs. Has anyone seen a similar issue. I have also attempted to view the ULS logs on the Office Web Apps server, but I don't see anything that looks like a rendering request. But, I also don't know what that request would look like. The Exchange and Office Web Apps server are in the same network with no firewall in between them The local firewalls have also been turned off, so any type of blockage should not be the issue.