Hi I have installed a Lync 2013 Server and Office Web Apps Server. Configured Lync topology, Office Web Apps farm and certificates.
However when i start the services i get this error message in the log saying Office Web Apps discovery failed.

"

Event ID:      41033

Description:

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

Attempted Office Web Apps Server discovery Url:

Received error message: Invalid Uri syntax for WAC configuration

The number of retries: 1,

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.

I can access the OWAS server Url from Lync Server

"
Connecting to the HTTPS discovery URL is working fine, and brings up the XML-page (after i click "show all content").
The two servers are located on the same internal network, DNS resolves fine both ways, and no firewall rules blocks any connections between the two. Can anyone please help me figure this out?

Only identical problem found online is here (Invalid Uri syntax for WAC configuration):
http://blogs.technet.com/b/dodeitte/archive/2012/09/10/office-web-apps-server-amp-lync-server-2013.aspx
He resolved the problem by assigning a new OAuthTokenIssuer certificate. This however did not fix the problem in my case.

Regards
Sverre A. Veel

Hi

It might be issue with your external web services SSL certificate selected.

Check this Thread

http://social.technet.microsoft.com/Forums/en-US/lyncserverpreview/thread/cf3a6b97-a3dc-4fa8-8214-2a2993d85a03/

Hi,
In addition, please make sure you have restarted front end and office web apps server after reissuing the certificate.

Hi there,

What was the ultimate fix for this?  The link here does not work anymore...

Many thanks.

Any solution? We see the same thing - and our Lync client is just giving us  "Some Sharing Features are unavailable due to Server Connectivity Issues",

and we can see the XML when we visit server.com/hosting/discovery and we are also able to see the 41032 and 41034 events on the FEs as expected...

I have exactly the same issue. XML discovery is fine and the Whiteboard also works fine but same error. Did you fix this? is it certificate related?