Topic Last Modified: 2005-11-17

The Microsoft® Exchange Server Analyzer Tool reads the following registry entry to determine if the SiteName registry value is present on the Exchange server:


If the Exchange Server Analyzer finds the SiteName registry value present, a warning is displayed.

This warning indicates that the Active Directory® directory service site membership has been hard-coded on this computer running the Microsoft Windows® operating system. This configuration is not recommended for Exchange Server.

When you hard-code a Windows site, you can cause failures of the Microsoft Exchange System Attendant service and general Exchange Server failures. You should consider removing the SiteName registry value. If you remove the SiteName registry value, Windows automatically joins the appropriate Active Directory site.

This article contains information about editing the registry. Before you edit the registry, make sure you understand how to restore the registry if a problem occurs. For information about how to restore the registry, view the "Restore the Registry" Help topic in Regedit.exe or Regedt32.exe.
To remove the SiteName registry value
  1. Open a registry editor, such as Regedit.exe or Regedt32.exe.

  2. Navigate to: HKLM\System\CurrentControlSet\Services\Netlogon\Parameters

  3. In the right pane, locate and delete the SiteName registry value.

  4. Close the registry editor, and restart the server to have the change take effect.

Before you edit the registry, and for information about how to edit the registry, see the Microsoft Knowledge Base article 256986, "Description of the Microsoft Windows registry" (

For more information about the SiteName registry value, see the Knowledge Base article 322834, "XADM: Event 1005, System Attendant Does Not Start" (