Your network contains an Active Directory domain named contoso.com. The network has
DirectAccess deployed. You deploy a new server named Server1 that hosts a management
application. You need to ensure that Server1 can initiate connections to DirectAccess client
computers. Which settings should you modify from the DirectAccess Setup console?

A.
Application Servers

B.
DirectAccess Server

C.
Infrastructure Servers

D.
Remote Clients

Explanation:
read the guide here :
http://blog.concurrency.com/infrastructure/uag-directaccess-infrastructure-servers-wizard/