For list server only: The list server feature requires the installation of Microsoft Message Queuing Services. This is a scalable event processing system service developed by Microsoft. It is included with every Microsoft Windows 2000/2003 version, although not always installed by default. For more information on how to install it, please see the chapter ‘Configuring the list server’. If you do not plan to use the list server feature, you do not need to install Microsoft MSMQ.