You may receive an error message in the ADClean.log file when you use the Active Directory Cleanup Wizard to merge two accounts by their SIDhistory attributes in Exchange Server 2003

When you use the Active Directory Cleanup Wizard (ADClean.exe) to merge two accounts by their SIDhistory attributes in Microsoft Exchange Server 2003, you may receive the following error message in the ADClean.log file:

This issue occurs if the logonHours attribute is already populated from a previous merge in the Active Directory Cleanup Wizard.

To resolve this issue, clear the logonHours attribute in the LDAP Data Interchange Format (LDIF) tool on the target account. Then, run the Active Directory Cleanup Wizard again. To do this, follow these steps:

1. Create a file, and then name it Import.ldf.
2. Make sure that this Import.ldf file is in a format that is similar to the following format:

   dn: CN=targetaccount,OU=Users,DC=test,DC=com
   changetype:modify
   delete:logonhours
   

3. To import the Import.ldf file, you must run the following command:
   ldifde -i -f Import.ldf -s Server
4. Run the Active Directory Cleanup Wizard again.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

For more information, click the following article number to view the article in the Microsoft Knowledge Base: