New Twitter CEO Elon Musk on Wednesday ended the company’s work-from-anywhere policy in his first email to staff, saying any exceptions to the ban would have to be personally approved by him. He told workers who survived last week’s mass layoffs at the company that they should prepare themselves for “difficult times ahead” and said there was “no way to sugarcoat the message” about how economic trends are set to hit a company like Twitter, which depends on advertising revenues. All employees will now be expected to be in the office for a minimum of 40 hours a week effective immediately. “The road ahead is arduous and will require intense work to succeed,” Musk wrote in the email, adding that he wants subscriptions to ultimately account for half of Twitter’s revenue.