Microsoft is announcing its biggest ever job cuts today, affecting 18,000 employees. In a memo, Microsoft CEO Satya Nadella says the company will cut 18,000 positions in the next year, with former Nokia employees expected to account for around 12,500 jobs. While the number is significant, its not surprising Microsoft is focusing its cuts on Nokia staff. Regardless, the 18,000 job cuts are the biggest reductions ever for Microsoft, topping the 5,800 headcount reduction from 2009. Microsoft now plans to share further details about its innovation investments on its July 22nd earnings call.