The SharePoint farm and the Office Web App farm is configured for the internal url, but it hasn't been configured for the external url.
How do I configure the external URL now?
should I be configuring this on the OWA server or the web server?
I changed the zone to External-HTTPS but it still isn't showing the preview. The thing is I have an alternate access mapping done for external clients, when they access it via the AAM, they cant see the preview feature. the preview shows the error