How will required two-factor authentication affect my team?
Newly invited members will be required to enable two-factor authentication after accepting the invitation to join your team.
Existing members will be required to enable two-factor authentication the next time they log in. Requiring two-factor authentication won't log your team member out of their devices or web sessions, and won't interrupt their workflow. Existing team members who try to connect a new computer or mobile device as their first log-in after two-factor authentication is enabled will be directed to the Dropbox website to log in (and set up two-factor authentication).