UK regulator moves to put Microsoft's business software — Copilot included — under special competition rules
Britain's Competition and Markets Authority on Friday, Oct. 16, 2026, proposed designating Microsoft with strategic market status in its business software ecosystem, the step that would let it impose binding conduct rules, and named Copilot's grip on workplace AI as a first area to examine.
Britain's competition regulator just pointed at Copilot by name and asked whether the AI assistant bundled into Office leaves room for anyone else. The answer matters beyond Britain: the agent that lives in your spreadsheet and inbox is the most valuable seat in workplace AI, and Microsoft already owns the building. Nothing is forced yet; it's a proposal with a February deadline. But if the CMA designates, "can I swap in a rival AI inside Office?" stops being a sales question and becomes a legal one.
On Oct. 16, 2026, the UK Competition and Markets Authority (CMA) proposed designating Microsoft with strategic market status (SMS) in its business software ecosystem under the UK's digital markets competition regime, and opened a consultation before a final decision. Strategic market status is a special label the UK can put on a firm that holds lasting power in a digital market; it is the step that lets the CMA write binding conduct rules. The announcement is a proposal, not a finished designation. Those lines are the CMA's.
The investigation was launched on May 14, 2026. Comments on the proposed decision are due by 5pm on Nov. 13, 2026. The CMA will take a final decision by Feb. 13, 2027, the statutory deadline. Those dates are the CMA's.
The scope is Microsoft's business software, including Word, Excel, Outlook, PowerPoint, Teams and "increasingly Copilot," plus security, server and operating-system products. Copilot is Microsoft's AI assistant built into those work tools. The CMA says this software is used by over a million UK businesses and public-sector organisations, with around 20 million monthly users. Those lines are the CMA's.
The CMA's provisional findings: Microsoft has a strong position in all five areas it examined — PC operating systems, productivity suites, security software, server operating systems, and relational database management systems. A relational database is software that stores records in tables other programs can query. Switching barriers limit customer choice. Commercial practices and integration advantages create further barriers rivals cannot easily overcome. Those findings are the CMA's, and they are provisional.
An indicative roadmap names areas for further evidence-gathering and possible action if Microsoft is designated: whether customers can freely choose the best AI tools and whether alternative AI providers have a level playing field against Microsoft's Copilot; whether bundling of security products limits choice; and whether customers can choose which cloud to deploy their software licences on, given Microsoft's licensing practices. Bundling means selling products as a package so it is harder to pick a rival for one piece. The CMA also flags making it easier for developers to integrate with Microsoft's ecosystem. Those lines are the CMA's.
The CMA cites the shift toward agentic AI in familiar workplace tools. Agentic AI, here, means software that can take a chain of steps inside those tools, not only answer a chat. It says the ability to mix and match AI services without depending on one provider matters for government resilience and "strategic autonomy." Those lines are the CMA's.
CMA chief executive Sarah Cardell said: "Organisations should be able to choose the products that work best for them, switch provider when they want to and combine services from different suppliers." That quotation is hers, as the CMA prints it.
SMS designation does not assume wrongdoing. If designated, the CMA could impose conduct requirements or pro-competition interventions, subject to legal tests. Findings in this announcement are provisional. The CMA has not ordered a fine or a specific remedy.
Separately, on cloud, the CMA said Amazon Web Services (AWS) and Microsoft have made material changes outside a formal SMS process, including removing data-transfer fees for customers switching cloud providers, connecting data centres with rivals starting with Google, and AI tools to automate switching. The CMA will keep a full cloud SMS investigation under review and will update again in spring 2027. Those lines are the CMA's.
The picture is the official portrait of Sarah Cardell, chief executive of the UK Competition and Markets Authority, smiling in front of an illuminated CMA Competition & Markets Authority logo wall. It is a UK Government / CMA portrait. The frame does not print a calendar date.
In plain terms, Britain's competition regulator said on Friday that it wants to put Microsoft's work software — Office, Teams, security, servers, and increasingly Copilot — under special competition rules. Nothing is designated yet. Comments close Nov. 13, and a final decision is due by Feb. 13, 2027. If the CMA does designate, one of the first questions it names is whether a rival AI assistant can get a fair shot inside Office against Copilot.