Microsoft is revoking internal Claude Code licenses and forcing engineers onto its own GitHub Copilot CLI, a decision driven not by performance problems but by the opposite: the Anthropic tool became too popular inside the company. The Verge's Tom Warren reported that Claude Code gained vast adoption across Microsoft over the past six months after the company opened access in December. Developers, project managers, and designers embraced the tool.
Non-engineers with limited coding knowledge started using it. Sources told The Verge it became "very popular, perhaps a little too popular." That popularity created a problem. Claude Code's success directly undermined Microsoft's own GitHub Copilot CLI, a command-line coding assistant that has been largely neglected by engineers in favor of Anthropic's alternative. The feature disparity between the two products drove the preference.
Microsoft's Experiences + Devices division, which covers Windows, Microsoft 365, Outlook, Teams, and Surface, must stop using Claude Code by June 30. Engineers are being told to migrate their workflows to Copilot CLI ahead of that cutoff, which coincides with the end of Microsoft's fiscal year.
Canceling Claude Code licenses cuts operational costs while transitioning into a new financial period.
"While Claude Code has been a popular addition, it has also undermined Microsoft's new GitHub Copilot CLI coding tool," Warren wrote, citing internal sources.
Microsoft EVP Rajesh Jha framed the move as a standardization effort in comments to The Verge. "When we began offering both Copilot CLI and Claude Code, our goal was to learn quickly, benchmark the tools in real engineering workflows, and understand what best supported our teams," Jha said.
"Claude Code was an important part of that learning. At the same time, Copilot CLI has given us something especially important: a product we can help shape directly with GitHub for Microsoft's repos, workflows, security expectations, and engineering needs." The decision does not end Microsoft's broader relationship with Anthropic. Claude models will remain accessible through Copilot CLI, and the company continues to offer Claude through consumer-facing Copilot and Microsoft 365 features.
Microsoft's Foundry agreement with Anthropic and the Cowork feature integrations are unaffected.
Developers who spent months mastering Claude Code now face forced migration to a tool their own adoption data showed they preferred less. The six-month window from launch to cancellation marks one of the fastest reversals of a widely adopted internal tool in recent Microsoft history.
