The Competition and Markets Authority has opened a Strategic Market Status investigation into Microsoft to examine its position in UK business software markets.
The regulator will assess whether Microsoft has substantial market power and whether its conduct is harming competition. The inquiry is focused on product bundling, cloud licensing terms and software interoperability, particularly whether those practices make it harder for rival cloud providers and emerging AI companies to compete.
The case is the fourth Strategic Market Status investigation launched by the CMA under powers introduced last year. Those powers allow the regulator to decide whether a large technology company should be subject to tailored conduct rules in the UK if it is found to have strategic market status.
Microsoft said it is "committed to working quickly and constructively with the CMA to facilitate its review of the business software market".
Legal specialists said the investigation could have effects beyond Microsoft if the company is designated under the regime. Any rules imposed after such a finding could reshape the conditions under which cloud providers, software groups and AI start-ups operate in the UK market.
Stacey Gray, commercial senior associate at Square One Law, explained how the framework is intended to work.
"Strategic Markets Status investigations were introduced by the UK Parliament to ensure competition law kept pace with developments such as AI and cloud computing.
"The aim is to decide whether a company, in this case Microsoft, should be designated with Strategic Market Status. That is effectively a pre-emptive, forward-looking power that enables the regulator to address risks to competition before they fully materialise.
"Before SMS was introduced, the regulator primarily relied on reactive, ex post enforcement, addressing anti-competitive conduct after it arose. That remains standard practice in most global markets.
"If the CMA designates Microsoft as having SMS, it can then impose a bespoke rulebook for how Microsoft operates in this territory, including how it bundles or delivers cloud operations and AI systems.
"In practice, this investigation is likely to focus particularly on how Microsoft's licensing and bundling practices shape competition in cloud and AI markets, areas where the CMA has already signalled concern.
"The ruling could also have a wider impact on the sector, particularly for rivals and businesses such as AI start-ups and cloud providers, by creating a more level playing field and reducing barriers to entry.
"When anti-competitive barriers are removed from a market, smaller companies have more space to innovate because they have a greater chance of being able to compete.
"If competitors believe it is impossible to get a foot in the door, especially against such large players, they are deterred from innovating and investing in new ideas because the chances of entering the market are so low.
"That stifles innovation across the sector and leaves end users, in this case businesses and institutions such as schools, local authorities and hospitals, with less choice and potentially less innovative options. It can have a real knock-on effect.
"It's not just a matter of constraining Microsoft's actions. If it gets SMS status, it's about expanding opportunity across the whole UK software ecosystem," Gray said.
Regulatory focus
The CMA's scrutiny comes as competition authorities pay closer attention to the way large technology companies tie together software, cloud infrastructure and AI tools. In Microsoft's case, that means examining whether its established position in workplace software and related services gives it an advantage that rivals cannot readily match.
Bundling has become a central issue because regulators are concerned that customers may be pushed towards a broader package of services rather than choosing separate providers on their merits. Licensing terms can also shape competition if they make it more expensive or more difficult for businesses to run widely used software on competing cloud platforms.
Interoperability is another area under review. If software products do not work smoothly with rival systems, smaller providers can struggle to win customers even when they offer competing services in cloud computing or AI.
Wider effects
For the wider UK technology sector, the significance of the investigation lies in what would follow any Strategic Market Status designation. The regime gives the CMA scope to create company-specific conduct requirements aimed at preventing anti-competitive behaviour before market damage becomes entrenched.
That approach differs from more traditional competition enforcement, which often addresses conduct only after a problem has emerged. Supporters of the UK system say earlier intervention could help preserve competition in fast-moving sectors where market positions can become entrenched quickly.
The CMA has already signalled concern about competition in cloud services and in the markets developing around AI. Any finding against Microsoft would therefore be watched closely by rivals, business customers and investors assessing the competitive environment for software and infrastructure providers in the UK.
Gray said the potential effect would reach beyond one company's compliance obligations. "It's not just a matter of constraining Microsoft's actions. If it gets SMS status, it's about expanding opportunity across the whole UK software ecosystem."