The case study details the user experience strategy employed by a telecommunication company undergoing a merger with two additional companies, focusing on integrating their systems while ensuring user satisfaction and operational efficiency. Key decisions included consolidating communication systems and creating a unified intranet, which resulted in 98% of over 100,000 users registering within three days of the merger. Additionally, continuous usability testing and user engagement strategies were critical to the project's success, leading to effective system implementation without requiring outsourced support.