Microsoft Azure grows 43%, passes $100B annual run-rate; Copilot tops 30M seats

Microsoft's fiscal Q4 2026 landed with $90.01 billion in revenue, up 17.8%, but the AI-relevant numbers were the story. Azure grew 43% year-over-year and, for the first time, cleared $100 billion in annual revenue, while commercial remaining performance obligations — a forward-bookings proxy — hit $678 billion, up a striking 84%. Microsoft 365 Copilot passed 30 million paid seats, giving concrete validation to the 'seats plus consumption' AI monetization model that many enterprise-software firms are betting on.

The scale reframes the AI-capex debate: Azure's growth rate at a $100B base implies durable enterprise demand rather than a bubble of experimentation, and the RPO surge suggests customers are committing multi-year. Copilot's 30M seats is the clearest evidence yet that per-seat AI assistants can convert at enterprise scale, not just in pilots.

Context matters for the read. The same week, Amazon raised its 2026 capex forecast to roughly $220 billion, and NVIDIA lined up $500B in AI-infrastructure financing — the hyperscaler arms race is accelerating in lockstep with these revenue signals. Microsoft also expanded Azure to serve third-party models (Anthropic's Claude, Google's Gemini) alongside GPT-5.6 and deepened its Mistral partnership for EU GPU capacity. The skeptic's caveat is margin: enormous capex against these revenues keeps the profitability-of-AI question open, but the demand side, at least, looks robust.