You are the Office 365 administrator for your company. You have a server that runs Windows Server 2012. You plan to install an Active Directory Federation Services (AD FS) web app proxy server.
You need to install and configure the required roles.
What role should you install and configure? used to enable your AD FS for accessibility from outside of the corporate network.

A.
Web Server (IIS)

B.
Network Policy and Access Service

C.
Application Server

D.
Active Directory Certificate Services (AD CS)

E.
Remote Access

Explanation:

In Windows Server 2012, a Web Application Proxy, a new role service of the Remote Access server role, is
References: https://msdn.microsoft.com/en-us/library/azure/dn151311.aspx