The ongoing legal challenge against Microsoft seeks £2 billion in damages for alleged overcharging of businesses using its software on competing cloud platforms. The case was filed with the UK's Competition Appeal Tribunal (CAT) and highlights significant cost disparities when running Windows Server on rival clouds compared to Microsoft's own services. Dr. Maria Luisa Stasi is leading the initiative, which was officially filed in December 2024, following a 637-page report from the Competition and Markets Authority (CMA) that found Microsoft's licensing policies disadvantage customers using services from competitors. Key findings from the CMA's investigation include significant price discrepancies, restrictions on product availability through AWS and Google, and limitations on transferring licenses to these platforms. The CAT hearing in December will determine if the case proceeds to trial. Microsoft is also facing additional legal challenges, including a complaint from Google regarding its licensing practices and a ruling from Austria's Data Protection Authority about illegal tracking of students. The CMA has recommended leveraging digital market powers to address these issues, but no official actions have been announced.