As you may already, Microsoft has included on Office 365 Enterprise plans the ability to implement and use a multi factor authentication process to secure access to Office 365, in addition of the classic logon/password.
It seems this feature will now allows remembering the device for a period of days defined by the administrator; meaning end-users will not have to answer the MFA request each time they connect to Office 365 resources FROM THE SAME DEVICE.
To enable this new feature currently in PREVIEW, logon to the Office 365 admin portal and reach out the User management section and go to the Setup section for MFA
To enable the Remember feature, drop the setup page and enable the Manage user devices and then define the number of days before the user has to answer again to the MFA request
