Your company deploys a new Active Directory forest named contoso.com. The first domain controller in the
forest runs Windows Server 2012 R2. The forest contains a domain controller named DC10.
On DC10, the disk that contains the SYSVOL folder fails.
You replace the failed disk. You stop the Distributed File System (DFS) Replication service. You restore the
SYSVOL folder.
You need to perform a non-authoritative synchronization of SYSVOL on DC10.
Which tool should you use before you start the DFS Replication service on DC10?

A.
Active Directory Sites and Services

B.
Dfsmgmt.msc

C.
Ldp

D.
Frsutil

Explanation:
http://support.microsoft.com/kb/2218556