UK Regulator Targets Microsoft with AI Cloud Licensing Probe — What the CMA's SMS Investigation Means
AI / AI Policy | 5 min read
The UK's Competition and Markets Authority (CMA) has announced it will launch a formal Strategic Market Status (SMS) investigation into Microsoft's business software ecosystem, beginning in May 2026. The probe will assess whether Microsoft's cloud software licensing practices reduce competition — and whether the company should be designated with Strategic Market Status, a classification under the Digital Markets, Competition and Consumers Act that would grant regulators significantly stronger powers to intervene in how Microsoft operates in the UK market. Hundreds of thousands of UK businesses and public sector organisations depend on Microsoft's software daily — including Windows, Word, Excel, Teams, and Copilot — making the stakes of the investigation substantial both for enterprise customers and for the competitive landscape of cloud and AI services in the UK.
The Core Concern: Licensing as a Lock-In Mechanism
At the centre of the probe are Microsoft's software licensing practices — specifically how widely used products including Windows Server and SQL Server are priced when run on rival cloud platforms. Regulators and competitors have previously found that Microsoft charges higher fees for customers using its software on competing services such as AWS and Google Cloud, compared with running the same software on Azure. Google has claimed it can cost up to five times as much to move legacy workloads to a non-Microsoft cloud — serving as a powerful disincentive to choosing any cloud provider other than Azure. Microsoft permits customers to reallocate on-premises licences to cover cloud-based instances on Azure, but not equivalently on rival platforms — creating a structural cost asymmetry that regulators argue may amount to using licensing to entrench cloud market position. The CMA warns this dynamic is becoming more consequential as AI is rapidly embedded into everyday business software tools — with Microsoft integrating Copilot AI across its Office and Azure stack in ways that could compound existing lock-in effects.
What SMS Designation Would Mean
Strategic Market Status is not a finding of wrongdoing — it is a designation that identifies a technology company as holding substantial market power under the Digital Markets, Competition and Consumers Act, and grants the CMA authority to impose conduct requirements designed to prevent abuse of that position. Google and Apple were designated with SMS by the CMA in October 2025 with regard to their mobile platforms. If Microsoft is designated, potential remedies could include mandatory interoperability requirements, restrictions on certain licensing conditions, new pricing transparency obligations, or changes to how Microsoft bundles AI tools within existing subscriptions. The CMA's priority, as stated by CEO Sarah Cardell, is to ensure that UK businesses and public sector organisations can mix-and-match AI software across suppliers rather than being locked into a single ecosystem — particularly as Microsoft's commercial subscription prices are set to rise by an average of 16% in July 2026 as the company includes access to more AI tools.
Microsoft, Amazon, and the Wider Regulatory Picture
The SMS investigation into Microsoft's business software sits alongside a broader CMA cloud competition process. Following engagement with the regulator, both Microsoft and Amazon Web Services have set out actions on cloud egress fees and interoperability — commitments designed to make it easier and cheaper for UK organisations to switch providers or operate across multiple cloud platforms. The CMA confirmed it will monitor progress on these commitments and review the market again within six months. Some critics have raised concerns that AWS was not subjected to an equivalent SMS investigation, arguing this risks a regulatory imbalance between the two largest cloud providers. Regulators in the EU and US are conducting their own investigations into cloud market concentration, suggesting the CMA probe is part of a broader global regulatory shift toward greater scrutiny of dominant cloud platform incumbents and their AI integration strategies. Microsoft has publicly committed to cooperating constructively with the investigation.
Key Takeaways
- • The UK CMA will launch a Strategic Market Status (SMS) investigation into Microsoft's business software ecosystem in May 2026 — covering Windows, Word, Excel, Teams, and Copilot — assessing whether licensing practices restrict competition in cloud and AI services used by hundreds of thousands of UK businesses and public sector organisations.
- • The core concern: Microsoft's licensing terms make it significantly more expensive to run its software on rival clouds (AWS, Google Cloud) than on Azure — Google claims up to 5× the cost for legacy workload migration — creating a structural cost asymmetry that the CMA argues functions as a cloud lock-in mechanism.
- • SMS designation — not a wrongdoing finding, but a market power classification under the Digital Markets, Competition and Consumers Act — would give the CMA authority to mandate interoperability requirements, licensing restrictions, or pricing transparency obligations. Google and Apple were designated with SMS for their mobile platforms in October 2025.
- • AI is central to the regulatory concern: as Microsoft integrates Copilot across its software stack and raises commercial subscription prices by 16% in July 2026, the CMA wants to ensure UK businesses can mix-and-match AI tools from multiple suppliers rather than being locked into a single Microsoft AI ecosystem.
- • Both Microsoft and AWS have committed to actions on cloud egress fees and interoperability — monitored by the CMA with a six-month review — while EU and US regulators conduct parallel investigations into cloud market concentration, signalling a coordinated global regulatory shift toward scrutinising dominant cloud platform AI integration strategies.