Domain Controller Restore with DPM

Hi,
I have taken backup of Windows Server 2008 R2 Domain Controllers (PDC and DC) through SCDPM 2012. Its a bare metal backup which contains image of active directory.
I want to restore Domain controller DPM backup for test purpose.
Is there any specific procedure or precaution to follow during the restoration of Domain Controller?
I have read somewhere that there are two types of restores in Domain Controller, Authoritative and Non-Authoritative restore.
Can anyone suggest me the right procedure for recovering Domain Controller through Domain Controller through DPM??

Regards,
Rohit