Topic Last Modified: 2005-11-18

The Microsoft® Exchange Server Analyzer Tool queries the Win32_ComputerSystem Microsoft Windows® Management Instrumentation (WMI) class to determine the value of the DomainRole key. Valid values for this key are shown in the following table.

Value Meaning


Stand-alone workstation


Member workstation


Stand-alone server


Member server


Backup domain controller


Primary domain controller

The Exchange Server Analyzer also queries the Win32_Service WMI class to determine the value of the Started key for ClusSvc, the Cluster service.

The Exchange Server Analyzer also queries the Active Directory® directory service to determine the value of the serialNumber attribute of all directory objects that have an object category of msExchExchangeServer. The value for the serialNumber attribute indicates the version of Exchange Server being used.

If the Exchange Server Analyzer determines that the value for the DomainRole key is greater than 3 on an Exchange Server computer, that the Exchange Server computer is not running in a Windows cluster, and that the version of Exchange running is Exchange Server version 5.5, a warning is displayed.

This warning indicates that Exchange Server 5.5 is running on an Active Directory server. This situation can cause problems with Active Directory Connector (ADC) because of a potential port conflict. If ADC uses this server as a target, you should make sure that the correct Exchange Lightweight Directory Access Protocol (LDAP) port number is used. By default, the directory server listens on TCP port 389 for LDAP requests. Unless the port for Exchange is changed and ADC is configured to use the Exchange port, ADC will not be able to communicate with Exchange.

Active Directory uses the standard LDAP port 389 for LDAP access. However, using the standard port number overrides the Exchange server residing on the same server that is also trying to listen to LDAP port 389. You must reassign the Exchange LDAP port to grant the Exchange server LDAP access to its directory.

To correct this warning
  1. Open Exchange Administrator.

  2. Expand Site Name, expand Configuration, expand Protocols, and then expand LDAP (Directory) Site Defaults.

  3. Change the port assignment from 389 to a port that is currently not being used.

  4. Click OK to save the change.

  5. Restart the Microsoft Exchange Directory Service for the change to take effect.

  6. As needed, reconfigure ADC that uses this server as a target to use the new port.

For more information about how to change the LDAP port assignment in Exchange Server 5.5, see the Microsoft Knowledge Base article 224447, "XADM: How to Change LDAP Port Assignments in Exchange Server" (