Britain’s competition watchdog has launched a fresh investigation into Microsoft’s software licensing practices within the cloud computing market, reigniting scrutiny that the regulator had previously stepped back from. The Competition and Markets Authority announced on Tuesday that it would fold Microsoft’s licensing conduct into a wider ongoing probe, marking a significant escalation in the UK’s effort to rein in what it sees as anti-competitive behaviour at the upper end of the technology sector.
The decision comes months after the CMA had declined to pursue direct action following earlier findings from one of its inquiry groups. That inquiry had already reached pointed conclusions about the state of cloud competition in Britain, and the return to Microsoft’s licensing arrangements signals that regulators are far from satisfied with the pace of change in the industry.
The original inquiry group had found that the dominance of Amazon and Microsoft across the UK cloud market was causing measurable harm to competition. Microsoft, in particular, was singled out for the way it structures licensing fees for its enterprise software products. The authority found that Microsoft was using its commanding position in products such as Windows Server and Microsoft 365 to effectively disadvantage rival cloud platforms. Businesses that chose to run Microsoft software on competing cloud infrastructure were being charged additional licensing fees, a practice that critics argue tilts the playing field firmly in Microsoft’s favour and discourages customers from switching providers.
This kind of conduct, known in competition circles as restrictive licensing, has become one of the defining concerns of the cloud era. When a company controls both the software that enterprises depend on and the terms under which that software can be deployed, it holds enormous leverage. Customers who have built their operations around Microsoft’s productivity and server tools face a financial penalty for choosing a different cloud host, which in practice means many simply stay within the Microsoft ecosystem rather than bear the extra cost. The CMA’s renewed focus on this dynamic reflects a broader recognition that dominance in software and dominance in cloud infrastructure, when held by the same company, can compound in ways that ordinary market forces struggle to correct.
The CMA noted that both Amazon and Microsoft are currently taking what it described as “material steps” to reduce some of their fees in the cloud market following the conclusions of the earlier investigation. This suggests a degree of voluntary movement from both companies, though the regulator’s decision to press ahead with a formal investigation implies that those steps are not yet considered sufficient to resolve the underlying structural concerns.
Amazon and Microsoft together hold an estimated thirty to forty percent share each of cloud services in the United Kingdom, covering essential infrastructure such as processing power, data storage and networking capacity. Google, the third significant provider, holds a smaller share estimated at between five and ten percent. The concentration of the market among two dominant players is itself a point of concern for competition authorities, but it is the behavioural dimension of how those players use their software portfolios that has drawn the sharpest regulatory attention.
Antitrust scrutiny of the cloud sector is not confined to the United Kingdom. The European Union and the United States are both conducting their own investigations into competitive practices within cloud computing, and the parallel nature of these inquiries reflects a shared anxiety among regulators on both sides of the Atlantic. The cloud market has grown with extraordinary speed over the past decade, and the regulatory frameworks designed to govern it have struggled to keep pace. What began as a relatively open market has consolidated quickly, and the companies that established early advantages in enterprise software have translated those advantages into commanding positions in cloud infrastructure.
The CMA’s current approach involves seeking what is known as strategic market status for the companies under review. This designation, which is part of the UK’s newer digital markets framework, would give the authority enhanced powers to intervene in how companies like Microsoft conduct themselves commercially, potentially allowing it to impose conduct requirements or structural remedies that go beyond the tools available under traditional competition law. Achieving that status requires a formal designation process, but the cloud investigation represents a meaningful step in that direction.
For businesses that rely on cloud services, the investigation carries real practical stakes. Companies that have felt locked into particular platforms due to the cost implications of switching will be watching closely to see whether regulatory action translates into genuine commercial freedom. The ability to move workloads between cloud providers without incurring punitive licensing costs would represent a meaningful shift in how the market functions, and it is precisely this kind of portability that consumer groups and smaller cloud providers have been calling for.
Microsoft has not been passive in responding to regulatory pressure. The company has made adjustments to its licensing terms in certain markets following European regulatory engagement, and it is expected to continue engaging with the CMA process. The extent to which those adjustments satisfy the authority’s concerns will shape the trajectory of the investigation considerably.
What the CMA’s renewed action underlines is that the initial wave of cloud regulation, which focused largely on data sovereignty and security, has given way to a more sophisticated set of concerns about market structure and competitive fairness. The question of whether dominant software companies can leverage their installed base to entrench dominance in adjacent markets is one that regulators are now taking seriously enough to pursue through formal channels, even when initial inquiries have not led immediately to enforcement. The investigation into Microsoft’s cloud licensing practices is, in that sense, less a beginning than a continuation of a longer reckoning with how digital market power actually works.
