The EU opens an antitrust investigation into whether Microsoft abuses its dominant position by bundling Teams with Office, the first investigation in 10+ years
and this time it's because of its Slack rival Ioanna Lykiardopoulou / TNW : Microsoft's Teams and Office bundling may breach EU competition rules Aaron Gregg / Washington Post : E.U. investigates Microsoft Office, Teams tie-up on antitrust grounds Natasha Lomas / TechCrunch : EU opens competition probe of Microsoft bundling Teams with Office 365 Javier Espinoza / Financial Times : EU probes Microsoft's bundling of Teams with Office software package Raf Casert / Associated Press : EU investigates Microsoft over concerns bundling Teams with Office eliminates competition Bloomberg : Microsoft Teams Faces EU Antitrust Probe in Salesforce Clash Twitter: Mark Hachman / @markhachman : We're generally a U.S. focused publication, but this EU investigation into allegedly illegal bundling of Teams into Microsoft's other products might be worth watching. https://economictimes.indiatimes.com/ ... Mary Jo Foley / @maryjofoley : Here's the EU press release on its decision to open an antitrust investigation of Microsoft bundling Teams with O365/M365 (following Slack's complaint about this in 2020): https://ec.europa.eu/... Florian Mueller / @fosspatents : OK the #Teams #antitrust investigation by @EU_Competition is now official. Regarding my inability to offer particular insights at this stage (as I pay for #Slack, use only the free version of #Teams, and rely on #OpenOffice😅) see my earlier thread: https://twitter.com/... Sean Tuffy / @smtuffy : I'm loath to defend big tech but I'm not sure what an enterprise software company is supposed to do here. Just let Slack/Zoom take market share? Especially since Microsoft's clients mostly want bundled solutions. @eu_commission : We have opened a formal investigation to assess whether Microsoft may have breached EU competition rules by tying or bundling its communication and collaboration product Teams to its popular suites for businesses Office 365 and Microsoft 365 ↓ Tom Warren / @tomwarren : The EU has opened an antitrust investigation into Microsoft bundling its Teams app with Office suites. It's the first EU investigation for Microsoft in nearly 15 years and comes after a complaint from rival Slack. Details here: https://www.theverge.com/... @eu_competition : #EUAntitrust Commission 🇪🇺 opens investigation into possible anticompetitive practices by Microsoft regarding Teams 💻🗣️ 👇 🔗➡️ https://europa.eu/!4fRHf9 [image] Lewis Crofts / @lewis_crofts : All very 2000s. @microsoft back in the EU crosshairs over allegedly bundling software. This time Teams to the detriment of others, such as Slack. Covid supercharged the move to such software. https://ec.europa.eu/... Simon Van Dorpe / @simonvandorpe : ❗️The @EU_Commission is investigating #Microsoft again. Following a complaint by Slack, Competition Commissioner @Vestager today opened a probe into possible tying of @MicrosoftTeams to its popular business software suites Office 365 and Microsoft 365 https://ec.europa.eu/...
Context & Ripple Effects
The case grew from Slack’s 2020 complaint that Teams was unfairly tied to Office 365, a challenge captured in Slack’s EU complaint over the Teams-Office tie-in. Microsoft had reportedly offered to stop bundling Teams in an effort to avert a formal case, but regulators were said to view those concessions as insufficient.
The opening of a formal probe turns a long-running complaint into a test of how the EU assesses distribution advantages inside major software suites. The dispute later advanced to preliminary EU findings alleging an undue advantage for Teams, underscoring the durability of the issue.
First-order effects
- Microsoft faces a formal EU examination of whether packaging Teams with Office 365/Microsoft 365 leveraged Office’s market position into workplace communications.
- Slack and other collaboration providers gain a regulatory channel to challenge the distribution advantage created when Teams is included with a widely used productivity suite.
Second-order effects
- Microsoft may need to defend, revise, or further separate the commercial packaging of Teams and Office; that would make standalone collaboration pricing and customer choice more consequential.
- Rival workplace-software vendors can use the investigation to sharpen their case that suite bundling—not only product features—shapes procurement outcomes.
Third-order effects
- If the EU establishes that this form of tying harms competition, large software platforms will face greater pressure to show that integrated suite distribution preserves meaningful customer choice.
- The case points toward competition scrutiny focused on how incumbent platforms use established enterprise products to seed adjacent services, rather than on standalone market share alone.
The trend: Enterprise-software antitrust is increasingly examining whether bundled distribution across a dominant suite can foreclose adjacent cloud-service rivals.