Windows Rights Management Services provide the platform for an organizational rights policy management system. Since this server component is provided as a premium service for Windows Server, a Windows RMS Client Access License (CAL) is required for each user publishing and/or viewing rights-protected content. However, up to two users may simultaneously access or use the RMS solely for administration of the software without a CAL. For more details on licensing requirements, please review the End User License Agreement when downloading this premium service.