Sorry,we can’t open this document because there was a problem talking to the service – Office Web Apps 2013

Farm Information:

  1. Web Application published internally and externally (so make sure both URLs added to Alternate Access Mapping)
  2. 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


2-In SharePoint Server , Open SharePoint 2013 Management Shell and run the following commands:

Remove-SPWOPIBinding –All:$true

New-SPWOPIBinding -ServerName -AllowHTTP
Set-SPWopiZone internal-http
$c = Get-SPSecurityTokenServiceConfig
$c.AllowOAuthOverHttp = $true

then when I tried to access the Office documents from External URL I got the following error :

“Sorry,we can’t open this document because there was a problem talking to the service”


This issue related to TMG publishing rule so to fix it :

1- Open TMG Management Console

2- Go to Publish rule for Office Web Apps

3- Right click on the rule and choose Configure HTTP

4- Uncheck  Verify Normalization

5- Click ok

6- Click Apply

7- Wait the sync process




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