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Microsoft Clears EU Probe After Unbundling Teams

The European Commission closed its multiyear probe into Microsoft after the company agreed to offer Office without Teams at a lower price for seven years, open key APIs for third-party interoperability, and enable data export for five years. The concessions prompted rivals to withdraw complaints and helped Microsoft avoid steep fines.

Published September 12, 2025 at 10:10 AM EDT in Software Development

The European Commission has closed a years-long antitrust probe into Microsoft after the company pledged to make significant changes to how it sells and opens up Microsoft Teams. The settlement follows complaints from rivals such as Slack and Alfaview that argued bundling Teams with Office gave Microsoft an unfair advantage.

What Microsoft agreed to

To resolve competition concerns, Microsoft committed to offer Microsoft 365 and Office 365 versions without Teams at a lower price for seven years, letting customers choose whether to add the collaboration app for an additional fee. Separately, Microsoft will open key APIs to enable interoperability with third-party messaging tools and allow those tools to export data out of Teams for five years.

The Commission said these measures are binding and intended to end tying practices that could prevent rivals from competing effectively. Slack and Alfaview have withdrawn their complaints following the Commission's market testing.

Why this matters for businesses and developers

The commitments change the procurement and technical calculus for organizations. Buyers now have clearer pricing options and a formal path to choose best-of-breed collaboration tools rather than defaulting to the bundled option. For developers, the API openness promises new integration points and fewer barriers to building features that interoperate with Microsoft 365 apps.

But practical work remains. Interoperability depends on the APIs Microsoft opens, SDK quality, rate limits, and documentation. Data portability will help migration, but exporters and importers must handle format mismatches, metadata, and compliance constraints.

Opportunities and risks

Third-party messaging and collaboration vendors can use the opening to improve integration and compete on features and price. Enterprises can negotiate cleaner licensing and design hybrid stacks that mix Microsoft and third-party tools. Conversely, if Microsoft restricts API depth or adds friction, the practical gains for rivals could be limited.

The EU avoided a legal fight and potential fines that could have reached a percentage of Microsoft's global revenue. Microsoft avoided punitive measures by offering binding remedies instead of contesting the Commission's preliminary findings.

Practical checklist for organizations

  • Review upcoming Microsoft licensing options and compare bundled vs unbundled pricing for your user mix.
  • Audit integration points you rely on and map where open APIs can replace proprietary links.
  • Plan data export tests to validate portability, metadata fidelity, and compliance controls before making a full switch.

For vendors, the moment is ripe to harden connectors, document APIs, and demonstrate real interoperability to win enterprise procurement decisions.

Bottom line

The EU's approval marks a pragmatic outcome: increased choice for customers and a window for competitors to regain traction, provided the technical commitments are meaningful in practice. Organizations should act now to assess options, run interoperability pilots, and update procurement strategies before the market fully adjusts. QuarkyByte's analytical approach helps translate regulatory commitments into technical roadmaps and costed migration plans so businesses can capitalize on the new choices without disrupting operations.

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QuarkyByte can help organizations translate these commitments into action: we model migration paths away from bundled stacks, design API-driven interoperability plans, and size potential cost and compliance impacts. Reach out to see a tailored roadmap that reduces lock-in and preserves productivity.