On October 16, 2026, the UK Competition and Markets Authority proposed designating Microsoft with strategic market status in its business software ecosystem under the Digital Markets, Competition and Consumers Act. The proposal covers operating systems, productivity suites, security software, server operating systems, and relational databases. A consultation runs until November 13, 2026, with a final decision due by February 13, 2027. Designation would open the door to later interventions on bundling, Copilot, Teams, and cloud licensing that affect UK customers.
The UK Competition and Markets Authority on October 16, 2026, proposed designating Microsoft as having strategic market status in its business software ecosystem, the first step that could lead to conduct requirements affecting how the company bundles products used by UK businesses and public-sector organizations. Legal, procurement, and technology teams with significant Microsoft footprint in the UK should track the consultation and prepare for possible changes in switching, integration, or AI-tool choice.
This is not legal advice. Organizations should consult counsel on any specific compliance or contractual implications.
- What changed? The CMA proposed SMS designation for Microsoft’s business software ecosystem, finding strong positions and switching barriers across five digital activities.
- When? Proposed decision published October 16, 2026. Consultation closes 5 pm on November 13, 2026. Final decision by February 13, 2027.
- Who is affected? UK-based businesses and public-sector organizations that rely on Microsoft productivity, collaboration, security, server, or database products, and any vendor that integrates with or competes against them.
- What to do this week? Review current Microsoft contracts and switching costs for UK entities, and decide whether the organization or its trade association will submit views by the November 13 deadline.
What did the CMA propose?
The Competition and Markets Authority published a proposed decision to designate Microsoft with strategic market status in respect of its business software ecosystem. The investigation, launched in May 2026, examined five digital activities: personal computer operating systems, productivity software suites, security software, server operating systems, and relational database management systems. The CMA’s provisional assessment is that Microsoft meets the statutory conditions of substantial and entrenched market power and a position of strategic significance, both for the ecosystem as a whole and for the individual activities.
The regulator noted that the products reach more than a million businesses and public-sector organizations in the UK, with around 20 million monthly users. It identified barriers that customers face when switching and limited ability for rivals to offer alternatives in parts of the stack. Designation itself does not find wrongdoing; it is the gateway that allows the CMA to impose conduct requirements later if it chooses.
What areas might face intervention?
The CMA published an indicative roadmap covering cloud licensing, AI features in productivity software (including whether customers can freely choose tools beyond Copilot and whether rivals can compete effectively), communications and collaboration software such as Teams, and security software bundling. It also flagged licensing practices that affect customers’ cloud options. CMA Chief Executive Sarah Cardell stated that organizations should be able to choose the products that work best for them, switch providers when they want, and combine services from different suppliers.
Microsoft has said its products are already interoperable. The regulator will gather further evidence during the consultation period before deciding on any specific requirements.
Why is this happening now?
The proposal uses powers under the UK’s Digital Markets, Competition and Consumers Act 2024. The CMA began the formal SMS investigation in May 2026. The October 16 publication is the proposed decision stage; a final designation decision must be made by the statutory deadline of February 13, 2027. Parallel work on cloud services has already seen Microsoft and Amazon take certain steps to improve choice, according to the CMA, with further measures expected.
What should Legal and Procurement teams do this week?
Identify UK entities and contracts that depend on the five product areas under review. Document current switching costs, data-portability constraints, and any bundled security or AI features that would be difficult to unbundle. Decide whether to file a consultation response—individually or through an industry group—by 5 pm on November 13, 2026 (responses can be submitted via the CMA portal or to [email protected]). Legal teams should also flag any existing enterprise agreements whose renewal or renegotiation windows fall before the February 2027 decision, so commercial terms can be reviewed in light of possible future conduct requirements.
Technology architecture teams can use the same window to reassess dependency on Microsoft-specific APIs or data formats that might become subject to interoperability expectations.
What should teams watch next?
The consultation closes November 13, 2026. The CMA has said it will make a final decision by February 13, 2027. If designation is confirmed, subsequent consultations on specific conduct requirements (bundling, Copilot choice, Teams, cloud licensing, security) will follow. Developments in other jurisdictions that are examining similar Microsoft business-software practices may also influence the practical outcome for global enterprises.
FAQ
Does the proposal already change Microsoft’s obligations?
No. Designation, if confirmed, is a status that enables later interventions. No new conduct requirements are in force from the October 16 proposal.
When is the consultation deadline?
5 pm on November 13, 2026.
When will the final decision be made?
By February 13, 2027.
Which products are in scope?
The CMA’s investigation covered PC operating systems, productivity suites, security software, server operating systems, and relational database management systems, treated as an ecosystem.
Is this limited to the UK?
The SMS designation and any subsequent requirements apply under UK law to the business software ecosystem as it affects UK customers. Multinational firms with UK operations are affected for those activities.
Last Updated: October 18, 2026.
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