Microsoft $MSFT ( ▲ 1.42% ) just revealed an eye-popping number tied to its cloud business: $625 billion in remaining performance obligations, or future revenue already under contract. That figure more than doubled from a year ago, highlighting just how strong demand for Azure and AI services has become.
What the backlog actually means
Remaining performance obligations represent signed deals for services that will be delivered over time. Microsoft said the average duration of these contracts is about two and a half years, with roughly a quarter expected to convert into revenue over the next year.
That gives the company strong visibility into future sales and suggests customers are locking in large, long-term AI and cloud commitments.
The OpenAI factor
A major driver of the surge in bookings has been large commitments from OpenAI and Anthropic. That concentration is part of what has investors uneasy. Heavy reliance on a few massive AI customers can amplify both growth and risk.
However, Microsoft noted that even excluding OpenAI, its backlog still grew solidly year over year, pointing to broad-based enterprise demand for Azure.
Big demand, big scrutiny
Despite the strong numbers, the stock fell as investors weighed whether such rapid growth is sustainable and how much spending will be required to support it. The backlog shows Azure demand is real and long-dated, but it also reinforces how central a handful of AI players are to today’s cloud growth story.
For Microsoft $MSFT ( ▲ 1.42% ), the challenge now is turning that record backlog into steady revenue while convincing investors the AI boom will deliver lasting returns on its massive infrastructure bets.