Office Web Apps Error: “CreateWopiHttpRequest failing due to invalid host”

In case Office Web Apps don’t work after the installations and configuration, check the error logs located at C:\ProgramData\Microsoft\OfficeWebApps\Data\Logs\ULS.

For the error

WOPI CheckFileInfo: Start [url:http://contoso/_vti_bin/wopi.ashx/files/4e6ec34afd3c4d0e846b6a4c28974e6a] d6a00ff8-7390-4d91-9d44-c6f56b0995b9
06/25/2014 11:52:03.05 w3wp.exe (0x1CF0) 0x6F80 Office Web Apps WAC Hosting Interaction ajjtl Medium WOPI – CreateWopiHttpRequest failing due to invalid host [wopiUrl: http:/contoso/_vti_bin/wopi.ashx/files/4e6ec34afd3c4d0e846b6a4c28974e6a] d6a00ff8-7390-4d91-9d44-c6f56b0995b9

Add the domain name and the URL of the site as New-OfficeWebAppsHost on OWA server

for http://contoso website in Microsoft domain run the below PowerShell commands on OWA server

New-OfficeWebAppsHost -Domain  “contoso”

New-OfficeWebAppsHost -Domain  “”



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