Microsoft’s Azure cloud platform stored approximately 11,500 terabytes of data for Israel’s secretive Unit 8200—the equivalent of 200 million hours of phone calls—mostly from Palestinians in the West Bank and Gaza, according to a Guardian investigation published on August 7, 2025. The report, based on interviews with 11 sources inside Microsoft and the Israeli military, details how the cloud infrastructure enabled the mass collection, storage, and analysis of civilian communications on an industrial scale, facilitating what intelligence sources described as easier preparation of airstrikes and other military operations.

A Secret Partnership Forged at the Top

The collaboration began in late 2021 when Yossi Sariel, then-head of Unit 8200, met with Microsoft CEO Satya Nadella. Shortly after, the unit started migrating vast troves of intercepted communications to Azure servers located in the Netherlands and Ireland. By July 2025, the data hoard had ballooned to 11,500 terabytes—roughly 200 million hours of audio, almost entirely recordings of everyday phone calls made by Palestinians.

Unit 8200, Israel’s equivalent of the NSA, is responsible for signals intelligence, code-breaking, and cyber operations. The unit has long faced criticism for indiscriminate surveillance of Palestinians, and the Azure integration turbocharged its capabilities. Three intelligence sources told The Guardian that the cloud platform made it “easier to prepare airstrikes and other operations in the Gaza Strip and Judea and Samaria,” the biblical term for the West Bank.

How the Surveillance Worked

Microsoft engineers worked directly with Unit 8200 personnel to deploy enhanced security layers on Azure servers, a project so sensitive that staff were instructed never to mention the unit by name. The goal, according to sources, was to capture and store up to a billion recordings in a single hour. This required not just massive storage but also powerful analytics tools to sift through the data. Azure’s machine learning and AI capabilities enabled the unit to flag potential targets by monitoring conversations in specific geographic areas, effectively turning the entire Palestinian population into a surveillance dragnet.

The Guardian reported that Unit 8200 used Azure to not only store raw audio but also to run speech-to-text and keyword-spotting algorithms. This allowed analysts to identify individuals or discuss locations for military action. One source said the system could “match a voice to a face” and track movement patterns.

The revelations immediately ignited a firestorm among human rights organizations and privacy advocates. “Indiscriminate surveillance of an entire civilian population is a clear violation of international law,” said a spokesperson for Amnesty International. Critics point to the Fourth Geneva Convention, which prohibits collective punishment and requires occupiers to respect the rights of protected persons. Yet over 2 million Palestinians in Gaza and 3 million in the West Bank live under Israeli military control, and their communications have become a vast pool of intelligence for Unit 8200.

The surveillance operation also raises questions under the General Data Protection Regulation (GDPR), as the data is stored on servers in EU member states. Privacy experts note that even if Microsoft claims no ownership of the data, the company facilitates processing of personal information of EU residents—some Palestinians hold dual citizenship—without apparent consent or legal basis.

Microsoft’s Defense

Microsoft has consistently denied knowledge of the specific uses of its technology. A senior company official told The Guardian that Microsoft “demanded that Israel not use its technology to identify targets for attacks.” The company commissioned internal and external reviews, which found no evidence that its software or AI products had been used to harm civilians. A spokesperson emphasized that “at no time during the engagement was the company aware of the surveillance of civilians or the collection of their cellphone conversations using Microsoft’s services.”

Yet critics remain unconvinced. The cloud giant’s business model separates it from direct control over customer data, but the sheer scale of Unit 8200’s operation—and the hands-on involvement of Microsoft engineers in fortifying the infrastructure—suggests deeper complicity. “When your engineers are sitting in the same room and hearing about ‘a billion recordings an hour,’ it strains credibility to claim ignorance,” said a former Microsoft employee involved in the project.

Employee Revolt and Firings

Internal outrage boiled over in April 2025 during Microsoft’s 50th Anniversary Copilot Event. Employee Ibtihal Aboussad interrupted a live stream, telling executives: “You are complicit in the genocide of Palestinians. Microsoft AI and cloud services are being used for surveillance and targeted attacks.” The protest quickly went viral.

Days later, Microsoft fired two employees who had organized an unauthorized vigil at the company’s Redmond campus to honor Palestinians killed in the Gaza war. Both were members of the employee group “No Azure for Apartheid,” part of the broader “No Tech for Apartheid” movement. The firings intensified criticism that Microsoft was silencing internal dissent while expanding its military contracts.

A coalition of over 300 employees petitioned management to cut ties with the Israeli military, but the company has not backed down. In an internal town hall, President Brad Smith defended the Azure deal as a standard cybersecurity engagement, but his remarks failed to quell the anger.

A Pattern of Military Cloud Deals

The Unit 8200 contract is not Microsoft’s first entanglement with defense-related controversies. In 2018, employees protested a $480 million contract to supply HoloLens headsets to the US Army. The company later won the $10 billion JEDI cloud contract (later canceled and replaced by JWCC), raising similar ethical debates. Google, Amazon, and others have faced their own employee revolts over military AI projects.

What sets the Azure–Unit 8200 deal apart is the direct link between corporate technology and the surveillance apparatus of an occupying power. Unit 8200 alumni have themselves exposed the unit’s practices: in 2014, a group of veterans published an open letter describing how the unit collects and stores Palestinians’ private information to “blackmail” individuals and apply pressure. The Azure collaboration appears to digitize and supercharge these long-standing tactics.

What Comes Next

The Guardian’s report adds momentum to a growing movement demanding tech companies disclose and restrict their military engagements. The European Union is considering stricter export controls on cloud services that could be used for mass surveillance. Investors, too, are beginning to ask questions: at Microsoft’s 2025 shareholder meeting, a proposal calling for human rights due diligence on military contracts received 28% of the vote—a significant jump from previous years.

For Microsoft, the Unit 8200 revelations threaten to tarnish a brand built on trust and productivity. As the company pushes deeper into AI and cloud dominance, it will face mounting pressure to draw clear red lines around how its technology is used. Employees, activists, and a growing segment of the public are demanding transparency that goes beyond carefully worded denials.

The Azure files in the Netherlands and Ireland still hold Palestinians’ words—secrets, love letters, business deals, arguments—all swept up in a digital dragnet. The question now is whether the company that enabled that dragnet will face meaningful consequences, or whether the cycle of denial and minimal scrutiny will continue.