You support a customer whose network environment includes Microsoft Lync Server 2013 Standard
Edition deployed with an Edge Server that is connected to the Internet. A user reports that when he
tries to share a Microsoft PowerPoint presentation in a Lync conference, external users receive the
following error message: “Some sharing features are unavailable due to server connectivity issues.”
You ask the customer to run the Get-OfficeWebAppsFarm cmdlet on the Office Web Application
Companion (WAC) server. He provides the following result:

You need to ensure that external users are able to share and view PowerPoint presentations in Lync
meetings. What should you do?

A.
Install WAC on the Edge Server.

B.
Set the ExternalUrl parameter on the WAC server and publish to the Internet by using a reverse
proxy.

C.
Install WAC on the Front End pool.

D.
Set the InternalUrl parameter on the WAC server and publish to the Internet by using a reverse
proxy.