Grey Matter India Technologies developed a single sign-on intranet portal using DotNetNuke (DNN) to replace the client's existing SharePoint portal, addressing issues of cost and aesthetics. The user-friendly portal facilitates daily activities with features like third-party integration and access control, while adhering to web usability principles. The project, completed in six months, implemented a three-tier architecture for flexibility and efficiency, integrating legacy systems and ensuring responsiveness across devices.