Sept. 9 (UPI) -- Microsoft's chief people officer said Microsoft employees need to return to the office to ensure stronger results for their collaborative work efforts in the artificial intelligence era. Microsoft is rolling out a hybrid work system requiring workers to be in the office three days each week, starting at its Puget Sound office in Washington state at the end of February. The change then will apply to all of Microsoft's U.S. locations, and then globally, Amy Coleman, Microsoft's