Deleted user account has been restored through system sate backup.
But it can be restored in DRSM mode i.e directory restored mode .
Active Directory Recycle Bin helps minimize directory service downtime by enhancing your ability to preserve and restore accidentally deleted Active Directory objects without restoring Active Directory data from backups.By default, Active Directory Recycle Bin in Windows Server 2008 R2 is disabled. To enable Active Directory Recycle Bin, your environment must meet the requirements to completed scenarioused to restore object deleted form AD or restore Multi OUs.
Directory Services Restore Mode
Active Directory Recycle Bin is a feature that helps minimize directory service downtime by enhancing your ability to preserve and restore accidentally deleted Active Directory objects without restoring Active Directory data from backups, restarting Active Directory Domain Services (AD DS), or rebooting domain controllers. When you enable Active Directory Recycle Bin feature, all link-valued and non-link-valued attributes of the deleted Active Directory objects are preserved and the objects are restored in their entirety to the same consistent logical state that they were in immediately before deletion. For example, restored user accounts automatically regain all group memberships and corresponding access rights that they had immediately before deletion, within and across domains. Active Directory Recycle Bin is functional for both AD DS and Active Directory Lightweight Directory Services (AD LDS) environments. Mohannad Hamid
The DS tools consist of the following commands DSQUERY - search for active directory objects matching criteria DSGET - retrieves selected attributes from active directory objects DSMOD - modify attributes for one or more active directory objects DSADD - create active directory objects DSMOVE - move active directory objects DSRM - removes/deletes active directory objects
Repair or recover Active Directory.
user
Tombstone
The Active Directory Schema defines the types of user,printer objects to be created in the domain
The GLobal Catalogue has a reference to all objects within Active Directory. Its is know as GC
lingering object
Active Directory stores information about all the objects, resources on the network, policies applied on them and permissions on the resources..objects can be users, computers, printers etc
, the server hosting the replica of Active Directory database is called Domain Controller. In it's database is all information about all objects, that exist in particular Active Directory domain.