Microsoft says it has barred the Israeli military from using the company’s services to spy on millions of Palestinian civilian phone calls made each day in Gaza and the occupied West Bank and stored in Microsoft’s vast Azure cloud computing platform.

It’s an unprecedented victory for No Azure for Apartheid, a group of current and former Microsoft workers demanding an end to Microsoft’s work with the Israeli military.

We speak to Hossam Nasr, an organizer with No Azure for Apartheid and a former Microsoft employee who was fired last October after organizing a vigil outside the Microsoft headquarters for Palestinians killed by Israel’s military in Gaza.