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Microsoft fights $2.8 billion UK lawsuit over cloud computing licences

Published by Global Banking & Finance Review

Posted on December 11, 2025

2 min read

· Last updated: January 20, 2026

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Microsoft fights $2.8 billion UK lawsuit over cloud computing licences
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LONDON, Dec 11 (Reuters) - Microsoft was on Thursday accused of overcharging thousands of British businesses to use Windows Server software on cloud computing services provided by Amazon, Google and

Microsoft Battles $2.8 Billion UK Cloud Licensing Lawsuit

LONDON, Dec ‌11 (Reuters) - Microsoft was on Thursday accused of overcharging thousands of British ‍businesses to ‌use Windows Server software on cloud computing services provided by Amazon, Google ⁠and Alibaba, at a pivotal hearing ‌in a 2.1 billion-pound ($2.81 billion) lawsuit.

Regulators in Britain, Europe and the United States have separately begun examining Microsoft and others' practices in relation to cloud computing.

Competition lawyer Maria Luisa ⁠Stasi is bringing the case on behalf of nearly 60,000 businesses that use the Windows Server ​on rival cloud platforms, arguing Microsoft makes it more ‌expensive than on its own cloud ⁠computing service Azure.

Stasi is asking London's Competition Appeal Tribunal to certify the case to proceed, an early step in the proceedings.

Microsoft, however, says Stasi's ​case does not set out a proper blueprint for how the tribunal will work out any alleged losses and should be thrown out.

MICROSOFT ACCUSED OF 'ABUSIVE STRATEGY'

Stasi's lawyer Sarah Ford told the tribunal that thousands of businesses had ​been overcharged ‍because Microsoft charges higher ​prices to those who do not use Azure, making it a cheaper option than Amazon's AWS or the Google Cloud Platform.

She also said that "Microsoft degrades the user experience of Windows Server" on rival platforms, which Ford said was part of "a coherent abusive strategy to leverage Microsoft's dominant position" in the cloud computing ⁠market.

Microsoft argues that its vertically integrated business, where it uses Windows Server as an input for Azure while also ​licensing it to rivals, can benefit competition.

In July, an inquiry group from Britain's Competition and Markets Authority said Microsoft's licensing practices reduced competition for cloud services "by materially disadvantaging AWS and Google".

Microsoft said at the ‌time that the group's report had ignored that "the cloud market has never been so dynamic and competitive".

($1 = 0.7473 pounds)

(Reporting by Sam Tobin; editing by Barbara Lewis)

Key Takeaways

  • Microsoft faces a $2.8 billion lawsuit in the UK.
  • Accusations of overcharging for Windows Server on rival clouds.
  • Case brought by competition lawyer Maria Luisa Stasi.
  • Microsoft claims its practices benefit competition.
  • UK regulators are examining Microsoft's cloud practices.

Frequently Asked Questions

What is cloud computing?
Cloud computing is the delivery of computing services over the internet, allowing users to access and store data and applications on remote servers instead of local computers.
What is competition law?
Competition law is a set of regulations that promote fair competition and prevent monopolistic practices in the marketplace, ensuring consumers have choices and fair prices.
What is overcharging?
Overcharging occurs when a seller charges a customer more than the agreed or fair price for goods or services, often leading to disputes and legal action.

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