UK Clears Microsoft Suit
- A UK tribunal allowed a mass lawsuit alleging Microsoft overcharged about 60,000 British businesses for running Windows Server on rival clouds. (insurancejournal.com) - The claim is valued at roughly $2.8 billion, or about £1.7 billion, according to reporting. (the-independent.com) - The case highlights regulators' and customers' focus on enterprise licensing and cloud pricing structures. (tomshardware.com)
A UK tribunal has cleared a mass lawsuit accusing Microsoft of overcharging British customers that ran Windows Server on rival cloud platforms. (usnews.com) The Competition Appeal Tribunal certified the case on April 21, 2026, in proceedings brought by competition lawyer Dr. Maria Luisa Stasi on behalf of nearly 60,000 UK businesses and organizations. The claim targets Microsoft, Microsoft Limited and Microsoft Ireland Operations Limited. (catribunal.org.uk) (oeclaw.co.uk) At the center of the case is Windows Server, software many companies use to run business applications in the cloud. Stasi alleges Microsoft charged higher wholesale prices when customers used Amazon Web Services, Google Cloud Platform or Alibaba Cloud instead of Azure. (usnews.com) (oeclaw.co.uk) The damages claim is estimated at more than £1.7 billion, about $2.8 billion. The tribunal’s order puts the case on an opt-out basis, so eligible UK organizations are included unless they choose to leave the class. (oeclaw.co.uk) (lbc.co.uk) The ruling does not decide whether Microsoft broke competition law. It means the tribunal found the claim fit to proceed toward trial after rejecting Microsoft’s arguments on loss calculation, trial planning and funding arrangements. (usnews.com) (oeclaw.co.uk) Microsoft said it plans to appeal the certification decision and disputes the allegations. The company argued its model of using Windows Server inside Azure while also licensing it to rivals can benefit competition. (usnews.com) The case lands as British regulators keep pressing on the same issue. In a July 2025 cloud market report, the Competition and Markets Authority said Microsoft’s licensing practices were reducing competition, and on March 31, 2026, it said a new digital markets investigation could address those cloud licensing concerns. (usnews.com) (gov.uk) That leaves Microsoft facing two tracks in the UK at once: a private damages case from customers and a live competition review from the regulator. The tribunal has opened the courthouse door; the fight over cloud licensing now moves to appeals and, if the order stands, a full trial. (catribunal.org.uk) (gov.uk)
