The UK’s Competition and Markets Authority (CMA) will open a formal investigation into Microsoft’s business software ecosystem starting in May, the regulator announced on Tuesday. The probe will examine whether Microsoft’s licensing practices unfairly tilt cloud competition in its favor, and it could force the company to change how it sells Windows, Office, Teams, and its Copilot AI tools to businesses.

What the CMA’s investigation actually targets

This is not a routine inquiry. The CMA is wielding its new digital markets powers, which allow it to designate companies with “strategic market status” (SMS)—a label for firms whose entrenched dominance can be used to impose remedies without a full antitrust trial. If Microsoft is designated, the CMA could require it to alter software licensing terms that make it more expensive or complex to run its popular products on rival clouds like Amazon Web Services (AWS) or Google Cloud.

The investigation covers a wide swath of Microsoft’s portfolio: Windows operating systems, the Office productivity suite (Word, Excel, Teams), and Copilot, the company’s rapidly growing AI assistant. The CMA said it had heard “wider concerns about Microsoft’s position in business software,” including productivity software and operating systems, and wants to ensure a level playing field as AI is built into everyday tools.

Microsoft and Amazon have already taken steps to improve cloud interoperability and cut egress fees after the CMA’s earlier cloud market study, but the regulator says “further steps are required.” The new SMS probe sharpens the focus: it will specifically examine how Microsoft’s licensing contracts with business customers affect their ability to choose cloud providers freely.

How it could affect your software and cloud choices

For enterprise IT managers and procurement teams, the investigation signals that licensing terms are now a frontline competition issue. If Microsoft is forced to unbundle or restructure its software pricing for rival clouds, the cost of running Windows Server, SQL Server, or Microsoft 365 workloads on AWS or Google Cloud could drop. That would give organizations more flexibility in designing hybrid and multi-cloud architectures without shouldering hidden licensing premiums.

Smaller businesses may benefit indirectly. Many lack the leverage to negotiate custom licensing deals, so any CMA-mandated transparency or fairness in pricing would level the playing field. Even for companies that remain all-in on Azure, the pressure could push Microsoft to offer clearer, more competitive terms to retain customers.

For individual users and consumers, the impact is less direct. The probe focuses on business-to-business contracts, not personal licenses for Windows or Office. However, a more competitive cloud market can spur innovation and better pricing in the software services that eventually reach consumers and small businesses.

The immediate takeaway is that licensing is no longer a back-office checkbox. It’s a strategic variable that can inflate cloud bills, complicate migration plans, and warp vendor negotiations.

The long road to this probe

The CMA’s interest in Microsoft’s licensing isn’t new. In 2022, Ofcom referred the UK public cloud infrastructure market to the CMA after identifying concerns about software licensing practices, especially Microsoft’s. Last year, the CMA provisionally found that the cloud market was “not working well” and suggested SMS designations for Microsoft and AWS.

During that market investigation, the CMA examined how Microsoft’s licensing rules could raise rivals’ costs or discourage customers from using competing cloud services. The regulator noted Microsoft’s market power in products like Windows Server, SQL Server, and productivity suites—foundational tools that make switching clouds difficult. The new SMS probe formalizes those concerns under a regime designed to act faster than traditional antitrust enforcement.

Enterprise buyers have long complained that running Microsoft software on non-Azure clouds often means paying more or navigating complex licensing terms. While Microsoft has defended its practices as commercially rational, the CMA now has the tools to test that defense against the real-world effect on competition.

Practical steps to take now

No immediate regulatory changes are in force, but smart IT and procurement teams should start preparing for a landscape where software licensing is more scrutinized. Here’s what you can do:

  • Audit your current licensing agreements. Are you locked into contracts that penalize multi-cloud use? If you’re considering a move to AWS or Google Cloud, document any cost differentials tied specifically to Microsoft software licenses.
  • Factor licensing into cloud cost modelling. When comparing cloud providers, include a line item for Microsoft licensing fees under different deployment scenarios. This is often overlooked, but the CMA’s focus makes it a key point of leverage.
  • Keep tabs on Microsoft’s voluntary changes. Microsoft has already adjusted some cloud licensing terms in response to European regulator pressure. A similar dynamic could unfold in the UK, potentially creating opportunities to renegotiate existing contracts.
  • Engage with industry consultations. The CMA will likely gather evidence from customers and competitors. If your organization has faced tangible issues with Microsoft’s licensing, sharing that insight (directly or through trade bodies) could shape the final remedies.

For now, the best move is to treat licensing as a living risk that may shift in your favor. The probe creates an opening for buyers to push for more flexibility during contract renewal discussions.

What comes next

The CMA has given itself room to act flexibly. If it designates Microsoft with SMS status—a decision that could take months of evidence gathering—it can then impose tailored conduct requirements. Those could range from pricing transparency mandates to outright bans on certain licensing terms that restrict multi-cloud use.

Microsoft has signalled cooperation: in a blog post, vice chairman and president Brad Smith said the company is “committed to working quickly and constructively to address these issues.” But the company will also defend its ability to design commercially sustainable licensing models. The real test will be whether the CMA’s eventual demands shift the economics enough to give rivals a fairer shot at winning workloads away from Azure.

Watch for two concrete signals. First, any interim measures or voluntary licensing tweaks Microsoft announces while the investigation is underway—these would indicate where the regulator’s pressure is biting hardest. Second, the scope of the final SMS designation. If it covers not just operating systems and productivity software but also Copilot and future AI tools, it could set a precedent for how AI market competition is overseen globally.

For UK businesses, the probe is a reminder that cloud procurement is never just about gigabytes and virtual machines. The fine print in software contracts can be as powerful as any technical advantage—and regulators are finally paying attention.