Microsoft Knowledge Base Article - Q287172
XADM: Exchange 2000 Setup Does Not Work with 0x80072030 Error Code
Cause:
This issue can occur if the Active Directory Connector is uninstalled by using the uninstall option with the RTM version of Exchange 2000. The Exchange 2000 RTM uninstall option for the Active Directory Connector removes the Active Directory Connections container from the Active Directory. The Remove All option in Exchange 2000 SP1 may not have this issue.
Microsoft recommends that if you need to uninstall an Active Directory Connector, do so by using the Exchange 2000 Service Pack one (SP1) setup.exe found in the i386\adc directory to avoid this issue. However, if you have already removed the Active Directory Connector by using Exchange 2000 RTM follow the steps in the "Resolution".
See link for resolution:
http://support.microsoft.com/default.aspx?scid=kb;en-us;Q287172
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