In Exchange 2000, what is the Active Directory Cleanup Wizard and what is it good for?
MSKB 270652 has the following information:
The Active Directory Account Cleanup Wizard is a utility designed to merge duplicate Microsoft Windows NT accounts that are created when multiple directories are migrated or upgraded to Active Directory. The Active Directory Account Cleanup Wizard searches Active Directory for duplicate Windows NT accounts, and then suggests merge operations that eliminate the duplicates. You can also verify the individual merge operations. Finally, the wizard merges various account types, their attributes, and their properties into a single user account. Removing duplicate accounts in Windows 2000 Active Directory can help improve performance of your Exchange 2000 servers.
The Active Directory Account Cleanup Wizard allows you to: