Microsoft has walked off a long-running EU antitrust battlefield with a deal rather than a penalty. On September 12, 2025, the European Commission announced it had accepted a package of legally binding commitments from Microsoft aimed at addressing competition concerns over how the company distributed its Teams collaboration app alongside Office-branded productivity suites. The upshot: no fine, but a set of rules that will govern Microsoft’s behavior for years to come.

This resolution closes a dispute that stretches back to a formal complaint filed by Slack in July 2020 and later joined by smaller rivals such as the German videoconferencing provider alfaview. At its heart, the case was straightforward: did including Teams with Office give Microsoft an unfair distribution advantage that blocked competitors from reaching customers? Regulators say the company’s commitments take the sting out of that concern.

The commitments — simple on paper, significant in practice

Microsoft’s package of remedies includes several concrete promises:

• Offer versions of Microsoft 365 and Office 365 without Teams, at a discounted price compared with suites that include Teams.
• Let customers holding long-term licenses switch to those versions without Teams.
• Improve interoperability so rival communication and collaboration tools can integrate essential functions with Microsoft products.
• Make it easier for customers to move their data out of Teams to rival platforms (data portability).

Most of the commitments will be legally enforceable for seven years, while the interoperability and data-portability obligations will last ten years — an unusually long leash designed to lock in competitive access to Microsoft’s ecosystem.

A long timeline, with multiple attempts to address the problem

That “final” outcome belies a series of steps and retreats. Slack’s complaint in mid-2020 framed the issue and kicked things off. The Commission opened a more formal probe in 2023 after gathering evidence and hearing from affected rivals. Microsoft first tried to blunt regulators by unbundling Teams in the European Economic Area and Switzerland in 2023, and then by promising — and later implementing — a global separation of the product in 2024. Those earlier moves helped, but Brussels judged them insufficient on their own and sought binding commitments instead.

Why the drawn-out process? Antitrust inquiries are part fact-finding, part market design. Regulators needed to see whether decoupling Teams from Office in EEA countries actually restored choices for customers and whether rival tools could meaningfully interoperate with Microsoft’s widely used productivity apps. A follow-up market test in May–June 2025 fed into the Commission’s final reading.

What the Commission and rivals said

Teresa Ribera, the European Commission’s executive vice-president for a “clean, just and competitive transition,” framed the decision as opening up a crucial market for competition: regulators want businesses to be able to choose the communications and collaboration product that best fits them. That rhetoric matters — Brussels is signaling that even dominant platform owners can be nudged to make markets more open without immediate blockbuster fines, provided they accept structural remedies.

Slack — now part of Salesforce — and complainant alfaview welcomed the ruling. Salesforce described the decision as vindication of concerns that Microsoft’s past tying practices had “harmed business,” while alfaview argued the commitments will help level the playing field in Europe for competitors. Microsoft, for its part, said it had engaged constructively with the Commission and would implement the obligations promptly.

So is this a slap on the wrist — or a win for competition?

The answer depends on how you weigh two competing facts. On one hand, Microsoft avoided a potentially huge fine (EU fines can reach up to 10% of global turnover). On the other hand, the remedies include pricing changes, porting and interoperability obligations, and long enforcement windows that could materially alter how Microsoft packages and sells productivity software in Europe — and in practice, some commitments will be implemented globally. That’s not trivial: pricing gaps and data-exit tools reduce the “friction” that made Teams the default choice for many customers.

Critics of settlements like this argue Brussels is using “soft” enforcement — negotiation and commitments rather than heavy fines — because it wants faster fixes and fewer multi-year appeals. Supporters counter that long, detailed commitments can actually be more protective of competition than a one-off fine, because they create ongoing behavioral obligations and monitoring. In this case, Brussels chose the latter route.

Why smaller rivals cared — and why customers should too

For Slack and smaller videoconferencing players, the problem was simple economics: Office is everywhere. If Teams is effectively distributed to millions of business users as part of a widely purchased suite, rival apps have to compete not only on quality but on distribution and switching costs. The remedies aim to reduce those frictions — cheaper Office seats without Teams, and easier data transfer — which can make it cheaper and easier for customers to adopt an alternative.

For customers, the practical benefits to look for in the coming months are concrete: clearer product choices when buying Microsoft-branded suites; explicit, enforced price differences between packages with and without Teams; tools and APIs that actually let rival services plug into Office workflows; and reliable export paths for messages, files and meeting metadata from Teams into alternatives. Whether those promises translate to real-world switching will be the true test.

The bigger picture: EU enforcement in the platform era

Brussels has been ramping up scrutiny of platform bundling and default arrangements across tech — from Google’s ad stack to Apple’s app ecosystem. This Teams settlement is another data point in a broader narrative: the Commission is increasingly willing to extract structural and behavioral remedies that reshape market incentives, rather than relying solely on punitive fines. That approach has trade-offs: it can change market practice more quickly, but it requires careful follow-up to make sure commitments are enforced and meaningful.

What’s next?

Now comes implementation and monitoring. The Commission will watch compliance closely — by design, the commitments are binding and enforceable for many years — and rivals and customers will watch whether the technical and commercial pledges actually lower barriers to switching. If Microsoft pauses or drifts, Brussels still has tools to act. If the remedies work, the Teams case could become a model for future tech enforcement: negotiated commitments that reshape competition without an immediate headline fine.

For now, the courtroom drama ends with a deal on paper and a sleepier headline than a giant penalty. But the real story will be written in the coming months — in price lists, in APIs, and in whether a Slack, an alfaview or an upstart can actually pry open a market that Microsoft had, for a time, tightly integrated into its cash cow.