The preferred method for defragmenting the Active Directory is to use the
Ntdsutil tool.
The Exchange Server ESENTUTL tool defragments database files. Open a CMD prompt and type:
ESENTUTL /D ntds.dit \[options\].
Typing ESENTUTL /? returns:
Microsoft(R) Windows(TM) Database Utilities Version 6.0 Copyright (C) Microsoft Corporation 1991-1999. All Rights Reserved. DESCRIPTION: Maintenance utilities for Microsoft(R) Windows databases. MODES OF OPERATION: Defragmentation: ESENTUTL /d\[options\] Recovery: ESENTUTL /r \[options\] Integrity: ESENTUTL /g \[options\] Upgrade: ESENTUTL /u /d \[options\] File Dump: ESENTUTL /m\[mode-modifier\] Repair: ESENTUTL /p \[options\] <<<<< Press a key for more help >>>>> D=Defragmentation, R=Recovery, G=Integrity, U=Upgrade, M=File Dump, P=Repair => DEFRAGMENTATION/COMPACTION: DESCRIPTION: Performs off-line compaction of a database. SYNTAX: ESENTUTL /d \[options\] PARAMETERS: - filename of database to compact OPTIONS: zero or more of the following switches, separated by a space: /l - location of log files (default: current directory) /s - location of system files (eg. checkpoint file) (default: current directory) /b - make backup copy under the specified name /t - set temp. database name (default: TEMPDFRG.EDB) /p - preserve temporary database (ie. don't instate) /o - suppress logo NOTES: 1) Before defragmentation begins, soft recovery is always performed to ensure the database is in a consistent state. 2) If instating is disabled (ie. /p), the original database is preserved uncompacted, and the temporary database will contain the defragmented version of the database.
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