Your network contains an Active Directory domain named contoso.com. The domain contains domain
controllers that run Windows Server 2008, Windows Server 2008 R2 Windows Server 2012, and
Windows Server 2012 R2.
A domain controller named DC1 runs Windows Server 2012 R2. DC1 is backed up daily.
During routine maintenance, you delete a group named Group1.
You need to recover Group1 and identify the names of the users who were members of Group1 prior to
its deletion. You want to achieve this goal by using the minimum amount of administrative effort.
What should you do first?

A.
Perform an authoritative restore of Group1.

B.
Mount the most recent Active Directory backup.

C.
Use the Recycle Bin to restore Group1.

D.
Reactivate the tombstone of Group1.

Explanation:
The Active Directory Recycle Bin does not have the ability to track simple changes to objects. If the
object itself is not deleted, no element is moved to the Recycle Bin for possible recovery in the future. In
other words, there is no rollback capacity for changes to object properties, or, in other words, to the
values of these properties.
There is another approach you should be aware of. Tombstone reanimation (which has nothing to do
with zombies) provides the only way to recover deleted objects without taking a DC offline, and it’s the
only way to recover a deleted object’s identity information, such as its objectGUID and objectSid
attributes. It neatly solves the problem of recreating a deleted user or group and having to fix up all the
old access control list (ACL) references, which contain the objectSid of the deleted object.
Restores domain controllers to a specific point in time, and marks objects in Active Directory as being
authoritative with respect to their replication partners.