Metadata cleanup is used to remove the records and data of an crashed Domain Controller or an unsuccesful demotion of a Domain Controller. It is executed on a working domain controller using ntdsutil.
The role of ESE in an active directory is to store and retrieve data through indexed and sequential access.Its the data storage technology from Microsoft.
because this is important
Active Directory is called active bacause it is actively updating it's data through replication from differnt sites and other domain controllers with in the network
Windows 2000 Active Directory data store, the actual database file, is %SystemRoot%\ntds\NTDS.DIT
NTDS.DIT
The schema is the Active Directory component that defines all the objects and attributes that the directory service uses to store data.
DomainDNSzones
Schema
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.
Metada data is data that describes other data.
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