This feature was only available to Office 365 Education customers, a tool we use a lot in our LMS, http://www.qualitaslearning.com, when we assemble it into education clients since it is a very powerful tool. Today everyone can start using this solution to create surveys, questionnaires and questions of all kinds, more information: https://blogs.office.com/2017/06/23/microsoft-forms-public-preview-for-office-365-commercial-customers/
