European Union (EU) has strongly criticised the US for putting pressure on Microsoft to hand over emails held on servers in Ireland.
The issue has become one of the first cases of cross border privacy raised by cloud computing.
The Financial Times cites the European Commission VP Viviane Reding as saying that the demand made by the US is against the law because it should have been taken through official channels, which include the law enforcement officials between the two countries.
She also added: "US may impede the attainment of the protection of individuals guaranteed in the [European] Union."
However, this is not the first time that US law enforcement agencies have tried such an attempt. Previously Microsoft was issued a warrant that required the tech giant to provide emails of an unnamed user of the Outlook email service to the law enforcement agency.
Recently, the US Supreme Court denied the attempt made by the law enforcement agencies to search any suspect's mobile devices. And the judges unanimously decided that the search can be conducted only if the officials have a search warrant.
This was one of the rare cases where the Court recognized individual's privacy. However, the latest issue raised by the EU and Microsoft has surely put US officials under a negative light.