UK Probe Targets Microsoft Business Software Ecosystem

The UK's Competition and Markets Authority (CMA) has launched an antitrust investigation into MSFT's business software ecosystem, focusing on licensing practices for products including Word, Excel, and Copilot . The probe, scheduled to formally begin in May 2026, will determine whether Microsoft should be given strategic market status (SMS), which would allow the regulator to impose penalties and mandate steps to improve competition in the cloud software market.

The investigation builds on earlier CMA findings that concluded both Microsoft and Amazon hold "significant unilateral market power" in cloud services. At issue is whether Microsoft uses its dominance in enterprise software, particularly Windows Server and Microsoft 365, to limit competition by imposing higher licensing fees when customers run Microsoft services on rival cloud platforms. The CMA's return to Microsoft's licensing arrangements signals regulators remain unsatisfied with the pace of change following a prior inquiry.

For investors, an SMS designation could have material implications for Microsoft's cloud revenue model. The probe also arrives as AI tools like Copilot are being rapidly embedded into business software, raising the stakes around whether Microsoft's bundling practices could face new restrictions. Microsoft has stated it will work constructively with the CMA to support customer choice and cloud competition.