Microsoft Forms is included in Office 365 business subscriptions (and in preview for Office 365 home), but how many people actually use Forms? As it turns out, Forms are easy to develop and share through web sites and Microsoft Teams, so maybe they should be used more often in your Office 365 deployment? https://www.petri.com/forms-office-365
Until the Forms team adds a simple logout link or button on the form, it is a complete non-starter for anyone in a shared device environment such as a school or kiosk. Completely unfathomable how they put leave this huge security and privacy hole in their product allowing users to impersonate/hijack the sessions of other users. Logging out of Office 365 does not log you out of Forms, and there is no way to log out after taking a Forms-based quiz other than deleting cookies and browser history.