When we deploy Windows Server 2008 R2 forest functional level we will have additional feature:

-          Recycle bin, which, when it is enabled, provides the ability to restore deleted objects when Active Directory services is running.

Let�??s start test this feature:

1.       Create “test” user.

2.       Delete them.

3.       Enable �??Recycle Bin Feature�?�, we do this only one for domain.

PS C:\Users\Administrator>
Enable-ADOptionalFeature -Identity 'CN=Recycle Bin Fe
ature,CN=Optional Features,CN=Directory Service,CN=Windows NT,CN=Services,CN=Con
figuration, DC=contoso,DC=gis' -Scope Forest -Target 'contoso.gis'
WARNING: Enabling Recycle Bin Feature on
CN=Partitions,CN=Configuration,DC=contoso,DC=gis is an irreversible action! You
 will not be able to disable Recycle Bin Feature on
CN=Partitions,CN=Configuration,DC=contoso,DC=gis if you proceed.

Confirm
Are you sure you want to perform this action?
Performing operation "Enable" on Target "Recycle Bin Feature".
[Y] Yes  [A] Yes to All  [N] No  [L] No to All  [S] Suspend  [?] Help
(default is "Y"):y

4.       Restore object:

PS C:\Users\Administrator> Get-ADObject -Filter {displayName -eq "Test Testowy"}
 -IncludeDeletedObjects | Restore-ADObject

5.       And now we are seeing that deleted object was restored.