LONDON, Jan 29 (Reuters) - Microsoft ​shares dropped ‌6.2% in Frankfurt ‌on Thursday a day after the company ⁠said ‌it had spent a ‍record amount on artificial intelligence ​in the ‌last quarter and posted slower cloud-computing growth, worrying investors. The ⁠decline was ​roughly in ​line with Microsoft's move ‍in ⁠U.S. after hours trading. (Reporting by ⁠Alun John; ‌editing by Dhara ‌Ranasinghe)