Hi All, We have a single server office web app 2013 (WAC) farm installed internally which works with SharePoint 2013 Enterprise with no problem. I checked the health status and it was reported as healthy.
We exposed this environment with TMG for external users which provides single sign on functionality using Forefront TMG form based login page by assigning a single listener to all 3 published webs (SharePoint Portal, My Site and WAC). Everything works great except when I try to open a PowerPoint file on the browser (PowerPoint Web App). It tries for a while and then ends up with following error: *"Either you've lost network connectivity or our server is too busy to handle your request. Please check your network connection and try again later."* Looking at TMG logs, Request Status 415 (Unsupported Media Type) is logged with no more details. Similar error was found numerous time in ULS on WAC server. I couldn't find any hind by googling this problem. Any idea where the problem is sitting? Again, this problem happens for PowerPoint files only, Word, Excel and OneNote are all fine. Regards, Shahram.
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