you need to configure the client computers that run Windows B to use Server2 and Server3 as BranchCache

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Your company has a main office and a branch office. An Active Directory site exists for each
office. The network contains an Active Directory forest named contoso.com.
The contoso.com domain contains three member servers named Server1, Server2, and Server3.
All servers run Windows Server 2012 R2.
In the main office, you configure Server1 as a file server that uses BranchCache.
In the branch office, you configure Server2 and Server3 as BranchCache hosted cache servers.
You are creating a Group Policy for the branch office site. In the branch office, you need to
configure the client computers that run Windows B to use Server2 and Server3 as BranchCache.

Answer:

Explanation:
http://technet.microsoft.com/en-us/library/ee649153(v=ws.10).aspx
http://blogs.technet.com/b/wsnetdoc/archive/2012/06/01/highlighting-branchcache-hosted-cachemode-in-windows-server-2012.aspx