Starbucks CEO Brian Niccol said the coffee giant will require many of its employees to work out of office for a minimum four days a week, from the current three, as part of a new policy expected to kick in later this year.Starbucks CEO Brian Niccol said the coffee giant will require many of its employees to work out of office for a minimum four days a week, from the current three, as part of a new policy expected to kick in later this year. VnExpress English