One or more Active Directory Connector servers were found

[This topic is intended to address a specific issue called out by the Exchange Server Analyzer Tool. You should apply it only to systems that have had the Exchange Server Analyzer Tool run against them and are experiencing that specific issue. The Exchange Server Analyzer Tool, available as a free download, remotely collects configuration data from each server in the topology and automatically analyzes the data. The resulting report details important configuration issues, potential problems, and nondefault product settings. By following these recommendations, you can achieve better performance, scalability, reliability, and uptime. For more information about the tool or to download the latest versions, see "Microsoft Exchange Analyzers" at]  

Topic Last Modified: 2009-12-11

Microsoft Exchange Server 2007 and Exchange Server 2010 setup cannot continue because one or more Active Directory Connectors (ADC) have been found in the current Microsoft Exchange environment.

ADC replicates objects from Exchange Server version 5.5 to the Active Directory directory service in a mixed mode Microsoft Exchange environment and is not supported by Exchange 2007 or Exchange 2010.

Exchange 2007 or Exchange 2010 setup requires that all ADC components be removed.

To resolve this issue, remove all ADC components, and rerun Exchange 2007 or Exchange 2010 setup.

To remove Active Directory Connector components

  1. To disable the ADC service on the server that is running the ADC service, right-click My Computer on the desktop, and then click Manage.

  2. Expand the Services and Applications node, and then click the Services node.

  3. In the right pane, right-click Microsoft Active Directory Connector and then click Properties.

  4. Change the Startup Type to Disabled. The next time that the computer starts, the ADC service will not start.

  5. Click Apply, and then click OK.

  6. To uninstall the ADC service, use the Active Directory Installation Wizard on the Microsoft Exchange 2000 Server or Microsoft Exchange Server 2003 CD. Open the \ADC\I386 folder and double-click the Setup.exe program. Follow the prompts to Remove All ADC service components.


    You must complete step 6 and Remove All ADC components to resolve this issue. It is insufficient to disable the ADC service.

For more information about ADC, see the following Microsoft Knowledge Base articles: