RESTORE DELETED OBJECTS IN ACTIVE DIRECTORY

In Active Directory, when someone flags an object for deletion, Windows marks it with an indicator called a tombstone. The process doesn't actually delete the object from the AD database; the object just lives on in this tombstoned state.

But let's say someone accidentally deleted the wrong object. What do you do then? You can still restore the deleted object. Download Sysinternals' free AdRestore utility from its Web site.
http://www.sysinternals.com/ntw2k/source/misc.shtml#adrestore

To view a list of objects available for restoration, execute AdRestore without any parameters, type:

C:\>adrestore

To prompt to restore a found object, execute AdRestore with the -r parameter, type

C:\>adrestore -r

Afterward, you may need to start Active Directory Users And Computers and enable the user account that you restored.