UK CMA SMS Probe Targets Microsoft Software Licensing Lock-In to Azure

Microsoft’s cloud business is heading into another regulatory test in the UK, and this one is more surgical than the CMA’s broad cloud market investigation that closed in July 2025. The watchdog has now moved toward a separate strategic market status probe focused on Microsoft’s business software ecosystem, with licensing practices again at the center of the complaint. That matters because the CMA is no longer just looking at cloud infrastructure pricing and migration friction; it is asking whether Microsoft’s software stack itself helps lock customers into Azure. The result could reshape how enterprises buy, move, and mix cloud services in the UK, especially as AI becomes more deeply embedded in everyday business software. (gov.uk)

Overview​

The UK cloud market has been under scrutiny for years, but the path to this latest move is important. Ofcom opened the original cloud services market study in October 2022, referred the matter to the CMA in October 2023, and the CMA’s final decision on the market investigation arrived on 31 July 2025. That final report concluded that cloud services are now a vital input to the UK economy and that competition was not working as well as it could, particularly around switching, multi-cloud usage, and licensing. (gov.uk)
The CMA’s July 2025 report did not stop at diagnosis. It concluded that technical and commercial barriers such as egress fees, combined with Microsoft’s licensing practices, could create an anti-competitive environment in which customers pay more to leave than to stay. The report explicitly devoted a chapter to Microsoft’s licensing practices and another to egress fees, showing that the regulator viewed these as structural rather than incidental issues. In plain English, the CMA was not describing a few awkward pricing quirks; it was describing the economics of lock-in. (assets.publishing.service.gov.uk)
That history explains why the CMA’s latest decision is a step beyond the usual “we have concerns” language. The regulator now plans to open an SMS investigation into Microsoft’s business software ecosystem in May, with the process potentially taking up to nine months. Under the Digital Markets, Competition and Consumers Act 2024, an SMS designation would allow the CMA to impose conduct requirements intended to open up markets and reduce entrenched advantages. In practice, that could give the watchdog a far more direct lever over Microsoft than the ordinary competition tools it has relied on so far.
The timing is telling. The CMA says it is acting now because concerns about today’s cloud market could simply be replayed in the AI era if the same gatekeepers dominate the next layer of business software. That argument is not hard to follow: if core productivity, identity, data, and server software remain tightly coupled to one vendor’s cloud, then AI services built on top of that stack may inherit the same switching costs and commercial leverage. The regulator is effectively saying that the market of 2026 should not become the locked-in infrastructure of 2030.

Why this case matters now​

The cloud market is no longer a niche infrastructure story. The CMA’s final decision said UK cloud services spending reached £10.5 billion in 2024, and revenues in IaaS and PaaS grew at an annual average rate of 29% between 2020 and 2024. That is a fast-growing market with a small number of very large buyers and a small number of very large sellers, which is exactly the kind of market where subtle design choices can have outsized effects. (assets.publishing.service.gov.uk)
The regulator also said that switching and multi-cloud require customers to take a series of steps and incur costs that affect their ability and incentive to move. That finding is essential because it means the CMA sees lock-in as a layered problem: transport costs, migration tools, licensing terms, and service integration all feed into the same outcome. Even if one obstacle is reduced, the broader competitive picture may remain distorted. (assets.publishing.service.gov.uk)
The immediate market response shows that the debate is already moving from theory to implementation. Microsoft and Amazon both point to new steps on egress and interoperability, while critics say those steps are too limited or too late. That tension is likely to define the next phase of the CMA process.

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The CMA’s Cloud Diagnosis​

The CMA’s 2025 cloud investigation did more than identify market concentration. It described a market in which a handful of hyperscalers enjoy major scale advantages, while customers face technical and commercial frictions that make real switching difficult. The regulator’s final decision framed cloud services as a core economic input, not a discretionary IT purchase, which raises the stakes for every licensing and migration rule. (assets.publishing.service.gov.uk)
One important feature of the CMA’s analysis is that it separated the cloud market into multiple layers of harm. It looked at barriers to switching, barriers to multi-cloud, Microsoft’s licensing practices, and committed spend agreements. That matters because it suggests the regulator is not expecting a single silver bullet. Instead, it is building a case that competition can be impaired through several mutually reinforcing mechanisms. (assets.publishing.service.gov.uk)

From market study to market intervention​

The sequence of events tells its own story. Ofcom studied cloud first, then referred the market to the CMA, and the CMA’s independent inquiry group published provisional findings in January 2025 before its final decision in July. In those provisional findings, the inquiry group recommended that the CMA use its new digital markets powers to consider SMS designations for AWS and Microsoft. The latest announcement shows that the CMA is now selectively using that power: it is pressing ahead with Microsoft software licensing scrutiny while pausing a broad cloud SMS move against both cloud giants for the moment. (gov.uk)
That selective approach is notable. Regulators often face a choice between sweeping intervention and targeted conduct rules. The CMA appears to be testing a middle path: let the cloud firms keep making operational commitments on egress and interoperability, but open a separate line of attack where the licensing problem appears most concentrated. In policy terms, that is a more granular approach than a single all-purpose cloud designation.
The cloud case also fits a broader pattern in the UK. The CMA has increasingly used sector-specific digital powers to shape conduct instead of waiting for a traditional antitrust case to mature. That approach is faster, more behavioral, and often more prescriptive. It can also be more controversial, because firms see it as regulation by another name.

What the market investigation actually found​

The final decision report emphasized that cloud services are now vital to UK businesses and that competition in the market is not functioning as well as it could. It also noted that customers of different sizes and use cases experience switching barriers differently, which is an important caveat: some businesses may be relatively free to move, while others are effectively trapped by their architecture, contracts, or operational complexity. That kind of uneven harm is often harder to fix with blunt remedies. (assets.publishing.service.gov.uk)
The report’s chapter structure is revealing because it mirrors the practical bottlenecks customers face. Egress fees are not just a pricing issue; they are a logistics issue. Licensing is not just a contract issue; it is a workload-placement issue. Committed spend is not just a commercial discount; it is a future switching constraint. The CMA’s framing suggests it views all three as components of the same strategic problem. (assets.publishing.service.gov.uk)

• Cloud competition is shaped by more than headline instance prices.
• Switching costs can come from software rules as much as network fees.
• Multi-cloud strategies can be constrained by integration friction.
• Enterprise buyers often optimize for risk, not only cost.
• Small changes in vendor policy can have large market effects. (assets.publishing.service.gov.uk)

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Microsoft Licensing Under the Microscope​

Microsoft’s licensing practices are the sharpest point in the CMA’s new move. The core complaint is straightforward: products such as Windows Server and SQL Server can be more expensive to run on some rival clouds than on Azure, because Microsoft permits customers to reallocate on-premises licenses to cloud instances in a way that advantages its own platform. Google has argued that this can make migration to a non-Microsoft cloud several times more expensive, and the CMA appears willing to test whether that dynamic distorts competition.
This is where software licensing turns into cloud strategy. Enterprises rarely buy infrastructure in isolation; they carry Windows, SQL Server, identity tools, collaboration software, and security controls into whatever cloud they choose. If the vendor controlling the software stack can alter the economics of deployment depending on the target cloud, then cloud competition is no longer just about compute and storage. It becomes a contest over who gets to define the baseline environment. (assets.publishing.service.gov.uk)

Why licensing can be a lock-in weapon​

Licensing is powerful because it acts before a workload ever reaches a cloud. The customer may believe it is making a pure infrastructure decision, but the effective cost of the workload can change depending on which cloud is chosen and which license terms apply. That makes licensing an upstream lever, and upstream levers are often more dangerous than visible price hikes because they are harder for buyers to spot in procurement spreadsheets. (assets.publishing.service.gov.uk)
Microsoft has long argued that its tools help customers manage hybrid and multicloud environments. Azure Arc, for example, is marketed as a bridge that extends Azure into on-premises, edge, and multicloud environments, projecting resources into Azure Resource Manager for centralized management and governance. Microsoft’s multicloud connector for Azure Arc also says it can connect non-Azure public cloud resources to Azure and provide a centralized source for management and governance. That is a real interoperability story, but it does not automatically solve the licensing question.
The distinction matters because management visibility is not the same as commercial neutrality. A tool can make it technically easier to monitor or govern another cloud while still leaving the economics of running key workloads skewed toward Azure. That is the heart of the CMA’s concern: interoperability theater is not enough if the pricing model still nudges customers toward one destination.

What Microsoft says it is changing​

Microsoft says it has already taken global steps to remove barriers to switching cloud providers, and it is now making new changes for UK customers migrating from its UK datacenters. Free egress will apply not only to transfers using standard internet channels, but also to transfers using the Microsoft Global Network. The company also says the free switch period will be extended from 60 days to 180 days, and that the definition of a qualifying switch will expand to include moving out of an individual Azure service rather than requiring a full exit from Azure.
Microsoft’s claim that these changes respond to CMA concerns is significant even though the source details here are company-reported. If implemented as described, the changes would reduce the penalty for partial migrations, which is often how enterprises actually move. Most large customers do not leave a cloud in one shot; they peel off workloads gradually. A policy that only rewards total exit is, by definition, less useful than one that recognizes incremental migration.
The company is also promising a dedicated interoperability request mechanism for other cloud providers within six months, modeled on the framework it implemented for Windows under the EU Digital Markets Act. That is a telling analogy. It suggests Microsoft understands that regulators now expect not just compliance, but a repeatable process for external parties to ask for interoperability on defined terms. The question is whether a request mechanism changes outcomes in practice, or simply formalizes a queue.

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AWS, Egress Fees, and the Politics of Cooperation​

AWS has an interest in this drama that is easy to overlook. The CMA’s cloud investigation did not only criticize Microsoft; it also identified Amazon as one of the two dominant providers in the UK market. Yet the latest move stops short of launching an AWS SMS probe on the cloud side, at least for now, because both companies have made commitments on egress and interoperability. That is a pragmatic regulatory choice, but it also creates a political risk: one giant can feel singled out while the other remains on the sidelines.
AWS says it has already launched AWS Interconnect multicloud in preview, with Google Cloud as the first launch partner and Microsoft Azure expected later in 2026. AWS also says the service offers private, high-speed connectivity between clouds, and that customers can avoid the traditional do-it-yourself networking complexity. Those are meaningful product developments, especially for enterprises building hybrid data and AI architectures. But the timing also looks like a regulatory hedge.

Why egress fees became such a flashpoint​

Egress fees are the classic cloud friction point because they affect the cost of leaving, not entering. In a healthy market, providers may charge for data transfer because bandwidth is not free. In a concentrated market, though, egress charges can become a moat, especially when combined with weak interoperability. The CMA’s final decision explicitly treated egress fees as a commercial barrier to switching and multi-cloud. (assets.publishing.service.gov.uk)
AWS’s multicloud product is best understood as a response to that regulatory and commercial pressure. It simplifies the mechanics of moving data between clouds, and it can do so over dedicated private connections rather than the public internet. That helps with latency, security, and reliability. It also helps AWS present itself as part of the solution rather than part of the lock-in problem.
Still, network products do not erase ecosystem power. If the application layer, identity layer, or licensing layer remains sticky, then cheaper data movement alone may not unlock real competition. In other words, egress reform is necessary, but it may not be sufficient. (assets.publishing.service.gov.uk)

Cooperation as strategy, not surrender​

The CMA has said it will continue “ongoing dialogue” on multi-cloud adoption and switching, and will review progress in six months. That gives Microsoft and AWS an opening to present themselves as cooperative actors, not obstructionists. The risk, however, is that voluntary commitments can soften scrutiny without fully changing the market structure. Regulators often accept cooperation because it delivers faster relief, but speed can come at the expense of permanence.
There is also a strategic reason both firms are engaging. If the CMA concludes that the cloud market can be made more competitive through commitments, the companies avoid the heavier hand of SMS designation. That is worth a lot. An SMS designation is not merely reputational; it can lead to ongoing conduct requirements and closer ongoing supervision. A cooperative posture is therefore a rational attempt to keep the regulator in the light-touch lane.

• AWS wants to be seen as enabling multicloud, not blocking it.
• Egress reforms are easier to explain than licensing reform.
• Private interconnects appeal to large enterprises with compliance needs.
• Voluntary commitments can reduce immediate regulatory risk.
• Competition pressure may accelerate product innovation in networking.

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The SMS Strategy and the Digital Markets Regime​

The CMA’s use of SMS powers is the real institutional story here. The Digital Markets, Competition and Consumers Act 2024 gives the regulator a more flexible toolkit than classic antitrust enforcement, allowing it to designate firms with strategic market status and then impose conduct requirements tailored to the specific digital activity. That is a much more modern regulatory model than a traditional, one-shot competition case.
The CMA has already shown that the regime can move quickly. Its Google mobile platform case led to designation in October 2025, and more recently the regulator secured commitments from Apple and Google to improve fairness and interoperability in app store processes. Those cases matter because they demonstrate that the CMA is willing to combine designation, commitments, and targeted rules rather than using only one instrument. Microsoft is now entering that same policy architecture.

Why a software ecosystem is different from a cloud platform​

The phrase “business software ecosystem” is not a cosmetic wording change. It broadens the focus from cloud infrastructure to the stack of software that shapes where workloads live and how they can move. That includes server software, database software, identity systems, management tools, and the commercial rules attached to them. For Microsoft, that is a far larger surface area than Azure alone.
If the CMA designates Microsoft in this space, the company could face obligations not just around pricing, but around how it structures interoperability requests, licensing portability, and customer switching paths. The practical effect could be to make Microsoft justify the default advantages of its own ecosystem. That would be a meaningful shift in how cloud-adjacent software is regulated in the UK.
This also has a competitive symbolism that extends beyond Microsoft. If the UK can treat software-layer behavior as a competition issue in the cloud era, other regulators may take the same view in adjacent markets such as identity, collaboration, AI tooling, and managed security. The boundaries between software, cloud, and AI are blurring, and regulators are following that blur.

Sequential path the CMA is likely to follow​

• Launch the SMS investigation in May.
• Gather customer and competitor evidence on licensing harm.
• Test whether Microsoft’s conduct creates durable market power.
• Decide whether designation is warranted under the DMCCA.
• If designated, consult on specific conduct requirements.

That sequence may sound procedural, but it matters because each step can change the bargaining power between Microsoft and its customers. The mere possibility of designation often pushes firms to negotiate concessions earlier than they otherwise would. That is probably part of the CMA’s strategy here.

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Enterprise Buyers and the Real-World Cost of Lock-In​

For enterprises, this is not an abstract regulatory bout. It is about whether long-lived workloads can move without punishing fees, contract traps, or re-licensing shocks. The biggest customers often have the resources to engineer around barriers, but they still face internal risk, retraining, and migration costs. Smaller organizations may be even more constrained because they lack the specialist teams to re-platform software safely. (assets.publishing.service.gov.uk)
The CMA’s report recognized that not all customers are affected equally. That is important because cloud lock-in often hides inside operational convenience. A customer may think it is choosing the most efficient platform, when in reality it has optimized itself into dependence on one vendor’s tooling, billing model, and support structure. The economic damage appears later, when a renewal cycle or regulatory requirement forces a move. (assets.publishing.service.gov.uk)

Enterprise impact versus consumer impact​

There is no direct consumer broadband-style harm here, but there is a broad economic effect. Cloud infrastructure underpins payroll systems, logistics, healthcare applications, retail operations, and AI services. When enterprise buyers face higher switching costs, those costs can eventually feed through to business investment, prices, and innovation rates across the economy. That is why competition authorities are willing to intervene even in markets where the end user never sees the invoice.
The upside for enterprises is more choice and more negotiation leverage. If regulators succeed in lowering switching barriers, procurement teams can demand better terms from incumbents without assuming that a move is economically impossible. That alone can alter buying behavior, because the credible threat of exit is often more important than actual exit. (assets.publishing.service.gov.uk)
There is also a governance angle. Many large organizations are under pressure to diversify suppliers for resilience, sovereignty, or compliance reasons. If cloud ecosystems become more portable, those governance goals become easier to implement in practice rather than only on paper. That is especially true for multinational firms juggling data residency, regional controls, and AI model deployment.

• Easier switching improves procurement leverage.
• Partial migrations become more realistic.
• Multi-cloud strategies become less risky.
• Licensing clarity helps finance and architecture teams.
• Better portability can support resilience and compliance goals. (assets.publishing.service.gov.uk)

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Strengths and Opportunities​

The CMA’s approach has real strengths because it combines market diagnosis with targeted pressure on the exact behaviors customers complain about. The opportunity is not just to penalize incumbents, but to normalize portability in a market where portability should have been standard all along. If the commitments stick, UK customers could gain genuine bargaining power. (assets.publishing.service.gov.uk)

• Stronger incentives for multi-cloud adoption.
• More realistic partial migration paths.
• Better transparency around software licensing.
• More competition in interconnect and data transfer services.
• Potential reduction in egress fee friction.
• Greater pressure for interoperability by design.
• A possible template for AI-era market oversight.

The biggest strategic benefit is that this could make cloud competition about service quality again rather than ecosystem captivity. Businesses do not necessarily want the cheapest cloud in a narrow sense; they want the cloud they can change, combine, and govern. That is a very different competitive promise, and it is the one regulators are now trying to protect. (assets.publishing.service.gov.uk)

Risks and Concerns​

The main risk is that the CMA ends up with partial progress and no structural reset. If Microsoft and AWS make enough voluntary commitments to calm the market, but not enough to change incentives, the result could be a regulatory truce rather than a competitive one. That would leave the hardest problems intact while creating a sense of closure.

• Voluntary commitments may prove too narrow.
• A Microsoft-only probe may leave market symmetry concerns unresolved.
• Interoperability requests could become slow and bureaucratic.
• Licensing changes may be hard to verify in practice.
• Smaller competitors may still struggle to gain scale.
• Enterprises may see limited benefit if architectural lock-in remains.
• AI services may inherit the same concentration patterns.

There is also a credibility issue for the regulator. If the CMA is seen as moving too slowly, critics will argue it is allowing the cloud giants to self-regulate their way out of accountability. If it moves too aggressively, industry will say it is discouraging investment and innovation. That balancing act is the whole game now, and the outcome will likely shape how future UK digital market cases are handled.

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Looking Ahead​

The next decisive moment is the planned SMS investigation into Microsoft’s business software ecosystem, due to start in May. Once that begins, the debate will move from cloud infrastructure economics to the deeper mechanics of software leverage, and that is likely to be more contentious. Microsoft will almost certainly argue that its tools improve portability and management across clouds, while rivals will say that the licensing system still favors Azure in ways that no dashboard can fix.
The CMA’s six-month review point on progress around egress and interoperability will also matter. If the companies deliver tangible improvements, the regulator may lean toward negotiated remedies. If progress is thin, it may become harder to resist more formal conduct requirements. In practice, this will be measured by whether customers can actually move workloads more cheaply and with less risk, not by how polished the product announcements sound.

Key things to watch​

• The launch of the SMS investigation in May.
• The CMA’s invitation for comments from UK customers and competitors.
• Whether Microsoft’s free egress changes are fully implemented as described.
• Whether AWS and Microsoft deliver meaningful interoperability mechanisms.
• Any sign that the CMA broadens scrutiny to other parts of the cloud stack.

The broader lesson is that cloud competition is increasingly being judged as a systems problem, not a price problem. Once software licensing, migration friction, identity, interoperability, and AI tooling are all part of the same competitive fabric, regulators can no longer afford to treat them separately. The CMA’s latest move suggests it understands that better than many expected, and if it follows through, the UK may end up setting one of the most important precedents in global cloud regulation. (assets.publishing.service.gov.uk)
Microsoft’s challenge is therefore larger than defending Azure. It must persuade regulators that its software ecosystem is genuinely open enough to support competition, not merely flexible enough to preserve its own advantage. If it succeeds, the company keeps the narrative of multicloud empowerment. If it fails, the UK may redraw the rules for how a dominant software vendor can behave in the cloud era, and that could echo far beyond London.

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Source: theregister.com Microsoft to face CMA scrutiny over cloud software licensing

 

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Microsoft’s cloud licensing strategy is heading back into the regulatory spotlight in the UK, and this time the stakes are higher than a conventional market study. The Competition and Markets Authority is now considering whether to give Microsoft strategic market status, a designation that would unlock stronger conduct rules under the country’s new digital markets regime. That shift follows months of concern that Microsoft’s licensing terms, especially for Windows Server and Microsoft 365 on rival clouds, may be distorting competition in a market already shaped by high switching costs and deep customer dependence. (gov.uk)

Background​

The cloud competition debate in Britain did not begin with this latest probe. It has been building since Ofcom first referred public cloud infrastructure services to the CMA in October 2023, arguing that the market’s structure and customer lock-in warranted a formal investigation. The CMA’s case page shows the inquiry ran through a sequence of issues statements, hearings, working papers, and provisional findings before it closed with a final decision on 31 July 2025. (gov.uk)
The central concern has been whether customers can realistically move workloads between providers without facing punitive costs, technical friction, or contractual barriers. The CMA’s provisional findings in January 2025 said competition concerns existed in the cloud infrastructure market, and the final decision recommended that the regulator use its digital markets powers to prioritize SMS investigations into Microsoft and AWS. In other words, the regulator moved from asking whether there was a problem to asking which company should be placed under a more formal, targeted regime. (gov.uk)
A big part of the scrutiny has focused on licensing. The CMA said the issue was not simply cloud infrastructure pricing in isolation, but how Microsoft’s software is priced when used on competing clouds, where businesses may pay more than they would on Azure. That matters because Microsoft’s enterprise software stack is not optional background noise; it is embedded in workflows, identity systems, collaboration, security, and server estates across the public and private sectors.
The new probe also reflects a broader regulatory mood shift. The UK’s Digital Markets, Competition and Consumers Act 2024 gave the CMA a more granular way to supervise firms with entrenched market power, rather than relying only on blunt market investigations. The CMA has already used that framework in other digital sectors, so this cloud move is part of a wider attempt to turn competition policy into a faster, more surgical tool.
The timing is especially important because cloud services are increasingly intertwined with AI deployment. As businesses build AI systems on top of cloud infrastructure, the same bottlenecks that once affected storage and compute now shape access to models, data pipelines, and security tooling. That is why the regulator’s interest in legacy licensing looks less like a backward-looking software dispute and more like a forward-looking infrastructure question. (gov.uk)

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What the CMA Is Really Testing​

At a surface level, the CMA is asking whether Microsoft should be formally designated as a firm with strategic market status in cloud-related digital activities. In practice, that is a test of whether the company’s position is strong enough, durable enough, and interconnected enough to justify special oversight. The question is not whether Microsoft is big; it is whether its scale translates into market power that can shape customer behavior beyond normal commercial competition. (gov.uk)

Why SMS Matters​

The SMS label is important because it is not just a badge of concern. It gives the CMA a pathway to impose conduct requirements and intervene against practices it sees as unfairly limiting competition or customer choice. That is a different regulatory posture from simply documenting concerns and hoping market forces solve them.
The CMA’s own cloud investigation page says the final report recommended prioritizing SMS investigations into Microsoft and AWS, with the board expected to decide which option to pursue in the first quarter of 2026. The current probe therefore looks less like a fresh complaint and more like a formal continuation of an already established policy direction. The regulator is effectively deciding whether it has enough evidence to turn recommendations into binding supervision. (gov.uk)
For Microsoft, that distinction matters enormously. A market investigation can end with warnings, recommendations, or generalized pressure; an SMS designation can lead to tightly drawn conduct rules on pricing, access, interoperability, and switching behavior. For cloud rivals, it could create the first serious UK mechanism aimed at reducing the advantages that come from controlling both the platform and the software that runs on it.
The regulatory logic is straightforward. If a firm controls a layer of software that customers must use, then that firm may be able to raise rivals’ costs even without explicitly blocking them. That is especially relevant in cloud markets, where software licensing can function as a gatekeeper that nudges customers back toward the incumbent ecosystem.

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Microsoft’s Licensing Problem​

Microsoft’s cloud competition exposure is tied less to raw infrastructure and more to the way its software is sold across different environments. The CMA has repeatedly focused on whether customers pay more to run products such as Windows Server on AWS or Google Cloud than they would on Azure. If true, that creates a built-in incentive to remain inside Microsoft’s own stack even when another cloud provider might otherwise be attractive.

The Cross-Cloud Tax Question​

The phrase many critics use is not a formal regulatory term, but it captures the core issue: a customer that wants portability may face a higher bill simply because it is leaving Azure. That does not necessarily amount to an outright ban, but it can work like a tax on switching. Over time, such a tax can freeze customers into one ecosystem even if they would prefer a multi-cloud strategy.
This is why the CMA and other regulators pay such close attention to input foreclosure and customer lock-in. If a platform owner can make rivals more expensive by changing the economics of the software customers depend on, the market may still look competitive on paper while becoming increasingly rigid in practice. That kind of harm is subtle, but in enterprise computing it can be more durable than overt restrictions.
The problem is amplified by Microsoft’s broad enterprise footprint. The company does not sell isolated products in a vacuum; it sells suites, identity systems, collaboration tools, and security products that fit together with cloud infrastructure. That integration can be a strength for customers seeking simplicity, but it can also turn into leverage if switching one component becomes costly because the rest of the stack is entangled with it. (gov.uk)
Microsoft has argued that the market is dynamic and that its licensing does not materially block competition. That dispute has been part of the record since the earlier cloud investigation, and it remains one of the central fault lines in the current debate. The company’s position is that customers still have substantial choice; the CMA’s position is that choice may be less real than it appears once licensing and switching costs are fully accounted for.

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Why AWS Is in the Same Conversation​

The Computing report frames the latest probe as being focused on Microsoft, but the wider regulatory context still includes AWS. The CMA’s final cloud report recommended SMS investigations into both Microsoft and Amazon Web Services, which means the broader competition problem was never viewed as a one-company story. The UK regulator has been trying to avoid a regime that singles out Microsoft while leaving the largest rival untouched. (gov.uk)

The Case for Parallel Scrutiny​

That matters because cloud competition is an ecosystem issue, not a simple vendor-versus-vendor dispute. High concentration, large switching costs, and data-transfer friction can entrench the biggest providers together, even if each one uses different tactics. A fair regulatory response therefore needs to examine both market structure and individual conduct. (gov.uk)
AWS has already signaled willingness to cooperate with the broader effort, including by introducing new rights for UK customers to use multiple cloud providers simultaneously and improving data portability, according to the report summarized in the user’s supplied article. That is notable because it suggests the largest players understand the direction of travel: regulators are moving toward expectations of portability, not just lower headline prices. Even when companies disagree on the diagnosis, they increasingly know they must speak the language of flexibility.
The challenge for the CMA is to avoid creating asymmetry. If Microsoft alone is put under strict obligations while AWS remains comparatively freer, the regulator risks nudging the market toward a different concentration rather than genuine contestability. That is why industry voices have stressed the need for consistent standards rather than bespoke pressure on a single firm.
There is also a geopolitical dimension. If the UK wants a healthier domestic cloud market, it cannot be seen as favoring one American hyperscaler over another without a clear competition rationale. The more the argument turns on sovereignty, AI resilience, and digital infrastructure independence, the more important neutrality becomes to the regulator’s credibility.

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The AI Angle​

The most important reason this story is moving now is that cloud has become the substrate for AI. Microsoft’s core software dominance is no longer just about office productivity and server licensing; it now reaches into Copilot, enterprise data services, identity controls, and model deployment pathways. The CMA has explicitly warned that market strength in cloud and adjacent software could make it harder for new entrants to compete as AI services expand. (gov.uk)

From Software Licensing to AI Infrastructure​

That linkage changes the stakes. In older competition cases, the argument often centered on whether customers were overpaying for software or stuck with one vendor’s ecosystem. In the AI era, those same constraints can shape access to workloads, data movement, inference costs, and the speed at which startups can scale. (gov.uk)
AI also increases the value of data portability. Businesses that want to train, fine-tune, or orchestrate AI systems across multiple environments need clean movement of data and workloads. If cloud licensing and transfer fees make that hard, the result is not merely inconvenience; it can limit the architecture choices available to customers building strategic systems.
That is why smaller cloud providers have framed the issue around customer-first infrastructure rather than abstract competition theory. Their argument is that if data and software can move freely, more firms can offer differentiated services instead of being reduced to niche alternatives. In a market where AI is accelerating demand, that may be the difference between ecosystem diversity and permanent hyperscaler dominance.
The CMA’s challenge is to craft remedies that address tomorrow’s market, not just yesterday’s one. A rule designed only to fix static licensing issues could be overtaken by AI integration, bundled services, or new commercial packaging. This is a moving target, and the regulator seems aware that the cloud market of 2026 is not the same market it began studying in 2023. (gov.uk)

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Industry Reaction and Political Pressure​

Microsoft has said it will cooperate fully with the investigation, and Brad Smith’s comments suggest the company wants to frame the issue as part of a broader AI transition rather than a legacy licensing fight. That is a shrewd rhetorical move because it pushes the debate toward innovation and away from monopoly-style analysis. It also signals that Microsoft prefers a dialogic regulatory process to a more adversarial one.

Smaller Providers Want Faster Action​

Smaller cloud firms, by contrast, are pushing for stronger intervention and faster remedies. The Computing report quotes Wasabi Technologies welcoming the probe as a step toward tackling complex and unpredictable pricing and high switching costs, while Civo warned that leaving AWS outside equivalent scrutiny could undermine the policy objective. Those reactions reveal how much of the industry sees this as a structural contest, not a narrow licensing dispute.
The political pressure comes from a familiar place: regulators are expected to support growth while also preserving competition. The UK government has long positioned digital regulation as a way to improve consumer choice, and the DMCC framework was built with exactly this type of problem in mind. That means the CMA is operating within a policy environment that is more receptive to intervention than it might have been five years ago.
At the same time, the regulator is trying to sound pragmatic rather than punitive. CMA chief executive Sarah Cardell has emphasized flexibility and speed, saying the authority wants real impact for UK customers while also getting ahead of emerging issues. That language suggests the CMA is trying to avoid the image of anti-tech zeal while still preparing to use tougher powers if voluntary commitments fall short. (gov.uk)
The risk is that market participants may hear the same message differently. To Microsoft and AWS, the probe may look like a negotiating tool that could evolve into formal obligations. To smaller rivals, it may look like long-overdue recognition that the cloud market has been tilted for years and that softer commitments are not enough. Both readings can be true at once, which is what makes the process politically delicate. (gov.uk)

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How This Could Change the Market​

If the CMA ultimately designates Microsoft with strategic market status, the practical effects could be significant. The regulator would gain the ability to impose conduct requirements aimed at pricing, interoperability, switching, and other areas that affect customer choice. That could force Microsoft to rework licensing structures that currently give it a competitive edge on its own cloud. (gov.uk)

Consumer and Enterprise Impact​

For consumers, the cloud story is mostly indirect, but it still matters. Better competition among infrastructure providers can lower the costs that flow into consumer-facing services, from productivity tools to streaming backends to AI-powered applications. The real immediate impact, however, will be felt by enterprise buyers who negotiate cloud contracts, portability terms, and licensing bundles every year.
For enterprises, even modest rule changes could be meaningful. If software can be licensed more neutrally across clouds, procurement teams gain leverage. If data egress and portability become easier, multi-cloud strategies become more realistic rather than merely aspirational. That may not make cloud cheaper overnight, but it could make vendor negotiations far less one-sided. (gov.uk)
The broader market effect could be to open more room for secondary providers and specialist platforms. Those firms often cannot match hyperscalers on scale, but they can compete on price transparency, data sovereignty, or customer service if the switching barriers are reduced. In that sense, the CMA’s intervention is not really about punishing success; it is about deciding whether infrastructure markets should reward scope as much as scale.
There is a subtle competitive implication here too. If Microsoft has to decouple software licensing from Azure advantage, the competitive relationship between software and infrastructure becomes more balanced. Rival clouds might then compete more on service quality and less on whether they can absorb the cost of Microsoft’s ecosystem penalties. That would be a major change in market design, not just a compliance tweak.

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Strengths and Opportunities​

The CMA’s renewed probe has a number of strengths. It is grounded in a multi-year evidence base, it fits the UK’s new digital markets framework, and it responds to a market where structural constraints have already been identified. It also gives policymakers a chance to shape cloud competition before AI entrenches today’s market leaders even further.

• The investigation has a long evidentiary trail, reducing the risk of a purely reactive decision.
• The SMS framework offers more precise remedies than broad, one-size-fits-all regulation.
• A licensing review could improve customer portability and multi-cloud flexibility.
• Smaller providers may gain a fairer shot if software and infrastructure are separated more cleanly.
• Enterprise buyers could benefit from better negotiation leverage and clearer pricing.
• UK regulators can position themselves as proactive on AI infrastructure competition.
• Stronger rules could set a precedent for other digital markets with similar lock-in dynamics.

Strategic Upside for the UK​

The UK has an opportunity to become a reference point for modern competition policy. If the CMA can show that a digital markets regime can improve contestability without crushing investment, that would be a meaningful proof of concept. It would also strengthen Britain’s hand in future debates about cloud sovereignty, public procurement, and AI resilience.

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Risks and Concerns​

There are also real risks. A badly calibrated intervention could create compliance burdens without materially improving competition, while a weak intervention could harden the current market structure for another decade. The CMA therefore has to balance speed, fairness, and technical accuracy in a market that is notoriously complex.

• Remedies could be too narrow and leave core lock-in mechanisms untouched.
• Overregulation could reduce incentives for cloud investment or product integration.
• Focusing on Microsoft alone could create an uneven playing field if AWS is treated differently.
• Poorly defined conduct rules could be hard to enforce in fast-moving cloud contracts.
• Short-term disruption could be passed on to customers through pricing changes.
• The market may repackage restrictions in subtler forms, making enforcement harder.
• AI-related changes could outpace the regulator’s assumptions before remedies take effect.

Enforcement Complexity​

One danger is that the regulator ends up fighting yesterday’s battle. Cloud providers can adjust packaging, bundle services differently, and redesign contractual terms quickly, which means a remedy aimed at one version of the problem may be obsolete by the time it lands. That is why the CMA will need narrowly tailored rules with room for technical updates.
Another concern is regulatory fragmentation. If the UK moves aggressively while the EU, US, or other jurisdictions move more slowly or in different directions, multinational customers may face a patchwork of compliance expectations. That could raise costs even as it tries to reduce them, particularly for firms operating across borders.

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Looking Ahead​

The key near-term question is not whether the CMA sees a problem; it clearly does. The real question is whether the regulator will now convert that diagnosis into an SMS designation and, if so, what conduct requirements it will impose on Microsoft and possibly AWS. The final shape of the outcome will reveal how ambitious the UK wants to be in enforcing digital market rules. (gov.uk)
The other thing to watch is timing. The CMA’s cloud case page says the board expected to decide which SMS investigation route to prioritize in the first quarter of 2026, which means the regulatory clock is already ticking. If the new probe is moving now, it is likely because the authority believes the moment has come to translate analysis into action. (gov.uk)

Watch These Signals​

• Whether the CMA formally opens SMS investigations against Microsoft, AWS, or both.
• Whether remedies focus on licensing, portability, interoperability, or all three.
• Whether the regulator treats AI-linked cloud services as part of the same competitive problem.
• Whether Microsoft offers voluntary changes before formal conduct rules are imposed.
• Whether smaller providers gain measurable market share after any intervention.

The most revealing outcome may not be a dramatic headline but a gradual shift in bargaining power. If enterprises eventually find it easier to move workloads, use multiple clouds, and buy Microsoft software without hidden cross-cloud penalties, that will indicate the regulator has succeeded in changing market behavior. If not, the UK may simply have added another layer of oversight to a market that still rewards the biggest players.
Microsoft’s next challenge is therefore not just legal or regulatory; it is strategic. The company must convince regulators that its cloud and software integration is innovation, not exclusion, at a moment when Britain’s competition authorities are increasingly willing to test that claim. The result could reshape not only Microsoft’s UK cloud business, but the standard by which the rest of the industry is judged.

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Source: Computing UK Microsoft faces fresh UK probe over cloud competition