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
CORRECT ANSWER: ADSIEDIT.MSC
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Source: http://kpytko.pl/active-directory-domain-services/non-authoritative-sysvol-restore-dfs-r/
According to a few other web sites the answer should be ADSIEdit.
The next step after stopping DFSR and restoring the SysVol folder is to run a tool to edit AD attributes. You can use AD Users and Computers with Advanced Features enabled or ADSIEdit to do this.
In the “Default Naming Context -> DC=domain,DC=local -> OU=Domain Controllers -> CN=Domain Controller name -> CN=DFSR-LocalSettings -> Domain System Volume” object, you need to set the msDFSR-Enable attribute to false.
Next, start up DFS replication via elevated command prompt:
repadmin /syncall /Adp
dfsrdiag PollAD
Next, use ADSIEdit to set msDFSR-Enabled back to true and run the commands again.
repadmin /syncall /Adp
dfsrdiag PollAD
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