The UK's Competition and Markets Authority has announced a strategic market status investigation into Microsoft's enterprise software ecosystem. For the thousands of UK businesses reliant on Microsoft 365, Azure, and Copilot, this could reshape how you buy, bundle, and switch your core business tools.
What Just Happened
On 31 March 2026, the CMA confirmed it is launching a strategic market status (SMS) investigation into Microsoft's enterprise software. The formal investigation begins in May 2026 and could take up to nine months.
An SMS designation is the most powerful regulatory tool under the Digital Markets, Competition and Consumers Act 2024. If Microsoft receives this designation, the CMA gains direct authority to impose conduct requirements — including rules about bundling, licensing terms, and competition in cloud and AI markets.
An SMS designation would enable us to tackle remaining concerns around Microsoft's licensing practices in cloud and would also enable us to ensure a level playing field as AI is rapidly embedded into everyday business software tools.
— Sarah Cardell, CEO, Competition and Markets Authority
The scope covers Windows, the full Microsoft 365 suite, Teams, Azure, identity management (Entra ID), security products, and Microsoft's Copilot AI assistant.
Why Now: Three Converging Forces
This investigation is the culmination of years of growing regulatory concern, driven by three converging factors.
The Cloud Market Investigation: The CMA published findings in July 2025 identifying significant concerns about licensing practices that made switching between cloud providers difficult and costly. Microsoft and AWS were each found to hold 30–40% of the UK IaaS market.
The Class Action: Nearly 60,000 UK businesses have joined a £2.1 billion lawsuit alleging Microsoft's bundling practices — particularly including Teams within Microsoft 365 — have stifled competition and inflated prices.
The AI Acceleration: Microsoft's aggressive integration of Copilot across Office and Azure raises concerns about extending existing dominance into AI before competitors can establish a foothold.
If your Microsoft 365 or Azure agreement is up for renewal in the next 12 months, the outcome of this investigation could directly affect your pricing and terms. Do not auto-renew long-term contracts without reviewing the regulatory landscape.
What's Being Investigated
The CMA is examining several interconnected practices across Microsoft's ecosystem. Google has publicly claimed migrating legacy workloads away from Microsoft can cost up to five times more than moving from a neutral starting point.
| Area of Concern | What the CMA Is Examining | Impact on UK SMEs |
|---|---|---|
| Product Bundling | Combining productivity, security, and cloud under single contracts | Paying for features you don't need; rivals can't compete on price |
| Licensing Lock-In | Long-term agreements making switching prohibitively expensive | Difficulty moving to alternatives even when better options exist |
| Cloud Competition | Licensing that favours Azure over AWS and Google Cloud | Higher costs running Microsoft software on non-Azure platforms |
| AI Market Entry | Copilot integration potentially entrenching dominance in AI | Reduced choice in AI tools; over-reliance on single vendor |
| Interoperability | Whether Microsoft products work adequately with rival solutions | Technical barriers to best-of-breed multi-vendor strategies |
The Numbers: UK Market Landscape
Estimated UK IaaS market share, CMA cloud market investigation (July 2025)
Microsoft 365 holds an even more commanding position — over 80% of UK businesses with more than 10 employees use some form of Microsoft 365 licensing.
What Microsoft Has Already Changed
Microsoft hasn't been entirely passive. Over the past year, the company has made several concessions:
- Egress fee abolition: Data transfer-out fees eliminated globally across Azure
- Extended switching window: Free switching period increased from 60 to 180 days
- Licensing flexibility: Adjustments to licence portability for non-Azure cloud platforms
- Teams unbundling: Microsoft 365 offered without Teams in the EEA (not yet extended to UK)
Brad Smith, Microsoft's President, stated the company is committed to working "quickly and constructively" with the CMA.
Microsoft's 180-day free switching window and zero egress fees are available now. If you've been considering moving workloads off Azure, the financial barriers have already been reduced significantly.
The SMS Precedent: Google and Apple
In October 2025, the CMA designated both Google and Apple with strategic market status for their mobile platforms. Those designations led to interoperability requirements, fairer app store terms, and restrictions on self-preferencing.
| Company | SMS Designation | Date | Key Outcomes |
|---|---|---|---|
| Mobile Platforms (Android, Play Store) | October 2025 | Interoperability requirements, app store fairness rules | |
| Apple | Mobile Platforms (iOS, App Store) | October 2025 | Sideloading provisions, payment alternatives |
| Microsoft | Business Software (under investigation) | May 2026 (start) | Pending — could include unbundling, licensing reform |
How This Affects UK SMEs
For UK small and medium-sized enterprises, this investigation has immediate and longer-term implications across licensing, cloud, and AI strategy.
Licensing Renewals
If your Microsoft agreement is approaching renewal, you're in a strong negotiating position. The mere existence of a CMA investigation creates leverage — Microsoft is motivated to demonstrate competitive behaviour, which may mean more flexible terms and better pricing.
Cloud Migration and Vendor Diversification
Businesses contemplating a multi-cloud strategy should factor the investigation timeline into planning. CMA conduct requirements could include mandated interoperability improvements that make future migrations easier. The investigation also underscores the risk of deep single-vendor dependency.
Typical Microsoft Dependency in UK SMEs
The AI Angle: Copilot and Competition
Copilot is now deeply integrated across Microsoft 365 — drafting emails in Outlook, creating presentations in PowerPoint, analysing data in Excel, and summarising Teams meetings. For businesses already on Microsoft 365, it's the most frictionless AI to adopt. That's precisely the concern: if the dominant productivity platform also becomes the default AI platform, competing tools face an uphill battle regardless of capability.
Enterprise AI tool adoption among UK mid-market businesses, Q1 2026 estimates
The question isn't whether AI will transform business productivity — it's whether businesses will have genuine choice in which AI tools they use, or whether that choice will be predetermined by their existing software vendor.
Stay or Diversify: Comparing Your Options
Stay With Microsoft
Diversify Strategically
What UK Businesses Should Do Now
The current regulatory environment creates both urgency and opportunity. Here are the steps every IT decision-maker should take.
1. Audit Your Microsoft Licensing
Review which products and features you actually use versus what you pay for. Many businesses discover they're on E3 or E5 plans when Business Premium would suffice. Understanding true usage is essential before making strategic decisions.
2. Review Contracts and Renewal Dates
If renewal falls within the next 12 months, negotiate shorter-term or more flexible arrangements rather than locking in for three more years. The regulatory landscape may look very different by early 2027.
3. Assess Switching Costs
Email migration is relatively straightforward. SharePoint and Power Platform applications are considerably more complex. Understanding these distinctions helps prioritise diversification targets.
4. Evaluate AI Tools Independently
Don't default to Copilot simply because you have Microsoft 365. Evaluate AI tools on their merits for your specific use cases — you may find different tools excel for different tasks.
5. Map Your Dependencies
- List all Microsoft products in use across the organisation
- Identify which integrations create the deepest lock-in
- Assess each component's switching difficulty (low, medium, high)
- Prioritise diversification targets by business impact
- Set quarterly review milestones aligned with the CMA timeline
Even if you plan to stay with Microsoft, mention the CMA investigation during your next renewal negotiation. Vendors are typically more flexible when regulatory scrutiny is active — this is the best negotiating environment UK businesses have had in years.
Long-Term Strategic Outlook
Looking beyond the investigation, the CMA's action signals a fundamental shift in how UK regulators view the enterprise software market.
Modular pricing is coming. The era of all-or-nothing bundles is drawing to a close. Expect more granular pricing where businesses pay only for what they need.
Interoperability will improve. SMS conduct requirements typically include interoperability mandates, making it practical to mix Microsoft products with competing solutions.
AI competition will intensify. If the CMA constrains Copilot bundling, competing AI tools could integrate more deeply with Microsoft 365, giving businesses genuine choice.
Timeline: What Happens Next
- 31 March 2026: CMA announces SMS investigation
- May 2026: Formal investigation begins
- Summer 2026: Stakeholder submissions period
- Autumn 2026: Interim findings expected
- Q1 2027: Final determination (within 9-month maximum)
- Mid 2027: If designated, conduct requirements take effect
Businesses that start reviewing their licensing and exploring alternatives now will be in the strongest position when the CMA publishes its findings — whether that means renegotiating Microsoft terms or diversifying providers.
How CloudSwitched Can Help
At CloudSwitched, we work exclusively with UK SMEs to ensure your technology decisions are strategic and future-proof. Our Cloud Email and Microsoft 365 services help businesses optimise licensing and manage migrations when diversification makes sense.
For a comprehensive review, our Virtual CIO service provides senior-level IT leadership — auditing your Microsoft dependency, assessing vendor risk, and building a roadmap aligned with regulatory changes.
Review Your Microsoft Strategy
The CMA investigation creates a rare opportunity to reassess your licensing and cloud strategy. Our team helps UK SMEs audit their setup, identify savings, and build resilient multi-vendor strategies.
Get in TouchPublished 31 March 2026. For personalised advice on how this affects your business, speak to our team.
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London-based managed IT services provider offering support, cloud solutions and cybersecurity for SMEs.
