Microsoft CEO Satya Nadella. (GeekWire File Photo)

Amazon has committed more than $1 billion to license Microsoft 365 cloud productivity software for 1 million of its corporate and frontline workers in a surprise “megadeal” between the crosstown rivals, Insider reported Tuesday, citing an internal document and a person familiar with the matter.

With the deal, Amazon plans to upgrade from traditional Microsoft Office software to the Redmond company’s cloud productivity suite, according to the report, which notes that Amazon had previously been reluctant to use cloud-based technologies from Microsoft given the rivalry between Azure and AWS.

GeekWire has contacted both companies for comment on the report.

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