In Windows 2000, Microsoft included a version of an Exchange Server
utility�esentutl.exe�that can defragment database files. At a command
prompt, type the following command to defragment ntds.dit (the default name for
the Active Directory�AD�database file):
ESENTUTL /D ntds.dit [options]For a list of the command options, type
ESENTUTL /?or
ESENTUTL /helpUsually, you use Ntdsutil to defragment your AD database; Ntdsutil is still the most supported version