Google CEO Sundar Pichai and Microsoft CEO Satya NadellaUdit Kulshrestha and David Paul Morris | Bloomberg | Getty ImagesMicrosoft took the unusual step Monday of publicly accusing longtime rival Google of running "shadow campaigns" in Europe designed to discredit the software giant with regulators.Microsoft lawyer Rima Alaily wrote in a blog post that Google hired a firm to recruit European cloud companies to represent the search company's case."This week an astroturf group organized by Google ...