Over the last four years, Microsoft has been battling with the US court system over the ability for US law enforcement to compel them to hand over data that is stored on servers outside the US. While that case focussed on data relating to a drug trafficking operation, Microsoft saw it as a test of how data sovereignty is enforced in the courts. One of the Microsoft's arguments was that the courts were the wrong place fo such a matter to be resolved and that the US Congress should decide. That happened, and now we have the CLOUD Act.