According to Yahoo News, Microsoft's attempt to avoid deeper European Union scrutiny of its Teams video-conferencing app has been unsuccessful, as the bloc's antitrust enforcers are preparing a formal complaint against the company's conduct. Microsoft's recent proposal to separate its Teams app from a broader business software package and sell it to customers separately with an annual discount did not satisfy regulators' concerns, according to anonymous sources. The European Commission is reportedly preparing a statement of objections to send to Microsoft, which could come in the next few months.

In August, Microsoft tried to address concerns raised by the EU's antitrust arm as part of a new investigation into how it ties Teams to its Office 365 and Microsoft 365 packages. This investigation followed a complaint from Salesforce's messaging platform Slack three years ago. Microsoft declined to comment on the EU's next steps, and the commission did not immediately respond to a request for comment. Microsoft is also facing at least two other complaints filed to EU regulators, including one by a European cloud group with Amazon's AWS among its members, accusing Microsoft of using unfair licensing practices to attract EU customers to its cloud infrastructure. Another complaint, filed by German cloud platform NextCloud GmbH in 2021, is about Microsoft bundling its OneDrive cloud system with Windows. Additionally, Microsoft is under investigation by the EU's digital antitrust regulators, who are examining whether its Bing, Edge, and Advertising services should fall under the scope of the bloc's Digital Markets Act, which outlines a series of dos and don'ts for major tech companies.