The Cybersecurity and Infrastructure Security Agency has revealed that Russian government-linked hackers have stolen emails between several U.S. federal agencies and Microsoft Corporation (NASDAQ:MSFT). What Happened: The stolen correspondence was part of a prolonged hack that occurred earlier this year, according to an emergency directive issued by CISA on April 2 and made public on Thursday. This also marks the first official acknowledgment that federal agency emails with Microsoft were compromised, reported Politico. The emergency directive instructed federal agencies to identify all compro…