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Farm Information: Web Application published internally and externally (so make sure both URLs added to  Alternate Access Mapping ) Office Web Apps 2013 (Published externally via  TMG 2010  and internally) I have a farm which connected to Office Web Apps 2013 and It's working fine internally so then we decided to enable it to open Office Web Apps externally by the following steps : 1- In Office Web Apps Server , Open Power Shell and run this command to add the External URL to existing Farm: Set-OfficeWebAppsFarm -ExternalURL  http://test.com/  2-In SharePoint Server , Open SharePoint 2013 Management Shell and run the following commands:  Remove-SPWOPIBinding –All:$true New-SPWOPIBinding -ServerName OfficeWebAppServer.com -AllowHTTP Set-SPWopiZone internal-http $c = Get-SPSecurityTokenServiceConfig $c.AllowOAuthOverHttp = $true $c.Update()  then when I tried to access the Office documents from External URL I got the following error ...

https://technet.microsoft.com/en-in/library/dn135237.aspx http://blogs.technet.com/b/office_resource_kit/archive/tags/office+web+apps/ https://technet.microsoft.com/library/8480064e-14a4-4b46-ad6b-0c836b192af2(Office.15).aspx http://blogs.technet.com/b/office_resource_kit/ https://technet.microsoft.com/en-in/library/ff433481.aspx https://technet.microsoft.com/en-in/library/jj219435.aspx

This article explains about Excel related issue in our SharePoint 2013 Environment. Whenever user tries to open excel files uploaded in document library, it launches browser to open the file and then displays below error- " We’re sorry. We ran into a problem completing your request. Please try that again in few minutes." Also see below screenshot- As part of issue analysis, following checks were performed- 1.) Check if Excel Services is running. ( This was running in our case. ) Open Central Administration -> System Settings -> Manage Services on Server -> Excel Calculation Service -> Started 2.) Check if Excel Service Application is associated to Web Application in question. ( This was configured in our case. ) Open Central Administration -> Application Management -> Manage Web Applications -> Select Web Application -> Select Configure Service Associations 3.) Check if Trusted File Location is configured for Excel Service...