Microsoft Tightens Internal AI Rules While Pushing a $1 Billion Alliance with EY

Microsoft orders employees to remove Anthropic's Claude Code by June 2026, betting on GitHub Copilot CLI to cut costs and sharpen its AI edge, while investing $1B in EY partnership.

Microsoft is drawing a sharp line inside its own walls. By the end of May 2026, the company will ban employees from using Anthropic’s Claude Code, a popular AI-powered development tool that briefly won favor with thousands of its own engineers, designers and project managers. The directive, which requires all teams to fully remove Claude Code from workflows by June 30, 2026, marks an aggressive push to steer internal developers toward Microsoft’s own GitHub Copilot CLI — and to stop one of its own products from cannibalizing the other.

The move is driven by cost as much as strategy. Agent-based coding consumes vast quantities of tokens, and flat-rate licensing models can mask the true expense — until the bill lands. Uber, according to industry anecdotes, burned through its entire 2026 AI budget in just four months. Microsoft, facing similar pressures, is pulling the plug on a rival it briefly embraced.

Yet even as the company clamps down internally, it is scaling up externally. Microsoft has agreed to a fresh $1 billion, five-year investment pact with consultancy EY to embed artificial intelligence into core business processes at industrial scale. Under the expanded alliance, EY serves as the primary testing ground for Microsoft’s AI tools. The firm has already deployed Microsoft Copilot to 150,000 users, clocking a 15 percent productivity gain, and plans to roll it out to 400,000 employees globally. Early wins include a 37 percent cost reduction in the finance department and a 95 percent drop in processing times, while the tax team has cut manual work by up to 90 percent.

The partnership sits alongside record-setting capital expenditure. In its latest fiscal quarter, Microsoft’s capital investments surged 84 percent to $30.88 billion, fueled by spending on data centers and specialized chips. That spending binge shows no sign of slowing: Azure revenue grew 40 percent in the same period, and the company’s AI business crossed an annualized revenue run rate of $37 billion, up 123 percent year over year.

But the monetization of those investments remains a work in progress. Only about 3.3 percent of Microsoft 365 subscribers currently pay for premium Copilot features. That modest uptake adds urgency to the internal cost-saving mandate. The company is effectively betting that by forcing its own developers onto GitHub Copilot CLI, it can sharpen the product’s edge and protect margins — while proving the tool can stand on its own against outside challengers.

Microsoft’s core business continues to deliver. Revenue in the latest quarter reached nearly $83 billion, and earnings per share hit $4.27, beating analysts’ estimates. The company also maintains its dividend: shareholders receive $3.64 annually, with the next quarterly payout of $0.91 due in June.

The stock, however, has struggled to reflect that operational strength. Shares have fallen roughly 10 percent since the start of the year in euro terms, currently trading near €363, while the U.S.-listed stock hovers around $418 — a 13 percent year-to-date decline that contrasts sharply with double-digit gains for many other mega-cap tech names. On an operating cash flow basis, the shares are trading at their lowest valuation since early 2026.

Two notable moves from large holders illustrate the divergent sentiment. The Bill & Melinda Gates Foundation Trust sold its remaining 7.7 million Microsoft shares, a stake worth about $3.2 billion, closing out a decades-long divestment process. Meanwhile, asset manager Ashton Thomas Private Wealth bought additional shares and now holds more than 170,000. Analysts remain broadly bullish, with a consensus price target near $560.

The big question is whether the productivity gains demonstrated inside EY — and the cost discipline signaled by the Claude Code ban — can be replicated across industries. If Microsoft can translate those early wins into durable cloud revenue, the massive infrastructure spending will begin to look prescient. More concrete updates on strategy are expected in the coming weeks.