Unit 8200, roughly equivalent in function to the U.S. National Security Agency (NSA), has transferred audio files of millions of calls by Palestinians in the occupied territories onto Microsoft’s cloud computing platform, Azure, operationalizing what is likely one of the world’s largest and most intrusive collections of surveillance data over a single population group. This is according to interviews with 11 Microsoft and Israeli intelligence sources in addition to a cache of leaked internal Microsoft documents obtained by the Guardian.

In a meeting at Microsoft’s headquarters in Seattle in late 2021, the then-head of Unit 8200, Yossi Sariel, won the support of the tech giant’s CEO, Satya Nadella, to develop a customized and segregated area within Azure that has facilitated the army’s mass surveillance project. According to the sources, Sariel approached Microsoft because the scope of Israel’s intelligence on millions of Palestinians in the West Bank and Gaza is so vast that it cannot be stored on military servers alone.