How to compact Active Directory in Windows 2008?

Active Directory Maintenance

1.    1.  Use ntdsutil command

2.     2.Stop Active Directory Domain Services.

3.     3. Type Help to know sub commands

4.   Type compact to c:\ 

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4.  5.     Quit à quit

6.     Copy the ntds.dit and overwrite the old one. Delete the log file.

7.      Check the integrity

7.     

8.     8.Type semantic  checker after the colon :. Then type verbose on . Then type go fixup

9. .Quit àquit

10. Restart Active Directory Domain Services