Enable two-step authentication at an organization level
To enable or disable two-step authentication:
Under organization settings, select Security in the left navigation.
Turn the toggle on (green) to enable two-step authentication.
Two-step verification is enabled and users can choose how they want to receive two-step authentication notices.
Note
For on-premises customers, this must be allowed at a system level.
If a user belongs to multiple organizations, their default organization determines their two-step authentication settings.