Q. Some Windows Server 2003 terminal servers cannot acquire a license when there is more than one License Server security group?

Microsoft Knowledge Base Article 918658 contains the following summary:

Consider the following scenario. You have multiple Microsoft Windows Server 2003 Terminal Services license servers in your enterprise environment. You use a License Server Security Group Policy setting to control license allocation. Additionally, you have more than one License Server security group in your enterprise environment. In this scenario, some terminal servers cannot acquire a license from the license server.