When configuring Office Web Apps for your local development environment, you may run into the following error:

“Sorry, there was a problem and we can’t open this document.  If this happens again, try opening the document in Microsoft Word.”


This error is probably caused by overlooking Step 5 in the TechNet article: http://technet.microsoft.com/en-us/library/ff431687.aspx:

Step 5: Change the AllowOAuthOverHttp setting in SharePoint 2013 to True

On your SharePoint 2013 Server, run the following in your management shell:

$config = (Get-SPSecurityTokenServiceConfig)
$config.AllowOAuthOverHttp = $true

And it should resolve your problem!

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