The Competition and Markets Authority has taken a significant step toward tighter oversight of global technology firms by publishing a proposed decision to designate Microsoft with strategic market status in respect of its business software ecosystem. The move, announced by the CMA this week, launches a formal consultation and sets out areas where the regulator could require changes to the way Microsoft bundles, licenses and integrates key workplace products. The designation is not a final finding of wrongdoing. Instead it is a statutory threshold in the UK digital markets competition regime. If the CMA confirms Microsoft as an SMS later in the process, it would gain powers to impose tailored conduct requirements or other interventions intended to protect choice and competition for UK businesses and public sector organisations. Why the CMA has acted The CMA says its provisional assessment is that Microsoft holds substantial and entrenched market power across elements of the business software ecosystem used by companies and public bodies. The regulator highlights high switching costs for customers as a central concern, along with integration advantages that could make it difficult for rivals to compete for core productivity functions, communications and emerging AI features. Specifically, the CMA has signalled it will focus further scrutiny on a small group of live issues laid out in an indicative roadmap. These include the way Microsoft bundles core applications and services, the interplay between Microsoft’s software licensing and cloud deployment choices, how security tools are packaged, and whether customers can freely choose AI assistants and other AI tools rather than being channelled to Microsoft’s Copilot. The proposed decision follows an investigation that the CMA launched in May. The case page and consultation documents set a timetable for responses from interested parties and name 13 February 2027 as the statutory deadline for any final SMS decision. Market and political context The action sits at the centre of the UK government and regulator’s broader push to make digital markets more contestable, protect public sector procurement options and preserve the ability of businesses to mix and match best-of-breed software. The digital markets competition regime, which created the strategic market status designation, has already been used against major platforms in areas such as search and mobile ecosystems. The CMA has previously designated other firms in different digital activities and has used the new powers to impose conduct requirements in some cases. The Microsoft proposal arrives at a moment when the competition authority and policymakers are also focusing on how AI is being integrated into enterprise products, and how that integration could affect switching, interoperability and vendor lock-in. What it could mean for UK businesses For customers, a confirmed SMS designation could translate into enforceable rules that force Microsoft to change behaviour seen as restricting choice. Potential interventions might include limits on bundling, requirements to make key features interoperable with rival services, or transparency and portability obligations for AI models and data flows. Procurement teams in government and large companies often buy large software bundles and negotiate enterprise licensing deals. If the CMA imposes conduct requirements, buyers could gain greater freedom to adopt competitive cloud providers or select third party AI tools to work alongside Microsoft software without losing functionality or support. For smaller software vendors and cloud providers, the CMA’s roadmap targets, particularly cloud licensing and AI interoperability, could lower barriers to entry and make it easier to offer alternatives to parts of Microsoft’s stack. That in turn could spur more competition on price, features and specialised AI services aimed at business users. Responses from Microsoft and industry Microsoft has signalled disagreement with the CMA’s provisional view. The company says its products are interoperable and that customers can choose alternatives. Microsoft also points to prior commitments and submissions in other jurisdictions, where it has defended bundling and licensing practices as procompetitive and aimed at simplifying procurement. Industry groups and cloud rivals have argued that regulatory scrutiny is needed to ensure a level playing field, particularly as AI features become central to enterprise software decisions. Technology lawyers and competition specialists warn that any eventual remedies must be carefully calibrated so they do not stifle innovation or impose onerous compliance costs on businesses. Next steps and timeline The CMA has opened a consultation on the proposed decision and invited stakeholders to respond by mid November. The regulator will consider evidence and submissions before deciding whether to issue a final SMS designation and, if so, what interventions are required. The statutory decision window means a final outcome is expected by 13 February 2027, unless the CMA exercises available procedural steps to extend that deadline. Why this matters beyond the immediate case The Microsoft proposal underscores how UK regulators are using new digital market powers to tackle structural competition concerns in enterprise software and cloud services. The case will be watched closely by multinational technology firms, cloud providers, software vendors and public procurement officials because it could set precedents for how AI features, bundling and licensing are regulated in the enterprise context. For UK businesses, the process offers the prospect of stronger rights to choose and combine software and cloud services. For policymakers, it is a test of whether targeted regulatory action can open markets without hampering investment and innovation in a sector where British companies increasingly rely on advanced AI-enabled tools.