Hi

I am stumped.  I have a working Skype for business implementation with two enterprise front end nodes.  I setup a Office Web Apps server, ran the set-officewebappsfarm command as noted in several blogs and configured in internal URL with an internal certificate. I then setup the Office Web Apps server in the topology and associated it with the enterprise pool, published the topology and waited for the event log entry saying it was successful. 

This implementation is completely internal and as far as I know should have no need to access the internet at this point.

Unfortunately I keep getting the following error on the S4B Front End Node:

Office Web Apps Server (WAC) discovery failed, PowerPoint content is disabled.

Attempted Office Web Apps Server discovery Url: https://ows-001.XXXXXXX/hosting/discovery

Received error message: The remote server returned an error: (407) Proxy Authentication Required.

The number of retries: 2, since 24/07/2015 08:38:06.

Cause: Office Web Apps Server may be unavailable or network connectivity may have been compromised.

Resolution:

Check HTTPS connectivity from this box to the Office Web Apps Server deployment using the discovery Url.

The Office Web App Server gets the following error both in the event log and bespoke logs

<?xml version="1.0" encoding="utf-16"?>

<HealthReport xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

  <HealthMessage>ProofingWatchdog reported status for Proofing in category 'PositiveWeb'. Reported status: Spelling attempt exception for "good": System.Net.WebException: The remote server returned an error: (407) Proxy Authentication Required.

   at System.Net.HttpWebRequest.GetRequestStream(TransportContext&amp; context)

   at System.Net.HttpWebRequest.GetRequestStream()

   at Microsoft.Office.Web.Watchdogs.ProofingWatchdog.WebCheck(Uri uri, String word, HealthResult&amp; errorResult, HealthCategory healthCategory)

   at Microsoft.Office.Web.Watchdogs.ProofingWatchdog.WebCheckPositive(Uri uri)</HealthMessage>

</HealthReport>

I have performed the following troubleshooting:

-I can browse to the discovery URL and received the XML response

-I have removed the server from the topology, republished and added it back in again.

-I have confirmed that the local system has no proxy set (through psexec -I -s cmd and netsh winhttp show proxy)

-I have checked get-OfficeWebAppsFarm and confirmed there is no proxy set, clipart and translation is disabled.

-Rebooted all servers many times

-The proxy log shows the following attempts from the server IP:

https://settings-win.data.microsoft.com:443

https://vortex-win.data.microsoft.com:443

Any help would be appreciated

Cheers

Steven

• Edited by steve-2001 Friday, July 24, 2015 10:12 AM

Hi,

I just had the same issue. The problem was on the FE Servers that the proxy hadn't been set to exclude the WAC Farm URL. As the FE Server connects to WAC as a Network Service, i.e. without a user been authenticated, the proxy will deny it.

So make sure you have the proxy in the Internet Settings exclusion list and if configured the netsh winhttp proxy settings.

Also, restart the RTCDATAMCU Service on the server after the change

Hope that helps.

Keith.

• Proposed as answer by -Keith- Thursday, August 13, 2015 7:50 AM
• Edited by -Keith- Thursday, August 13, 2015 7:53 AM