Microsoft Corp. has begun canceling leases for a substantial amount of datacenter capacity in the US, a move that may reflect concerns about whether it’s building more AI computing than it will need over the long term, TD Cowen said in a report.OpenAI’s biggest backer has voided leases totaling “a couple of hundred megawatts” of capacity, the US brokerage wrote Friday, citing channel checks or inquiries with supply chain providers. Microsoft has also stopped converting so-called statement of qua...