Update: Multi-factor Authentication (MFA) for Workers
This option can be enabled by accessing the ORG Details view and checking the "Enforce Two-factor Authentication for Workers" checkbox.
All workers (with "Active" status) linked to any Enterprise Client with this feature enabled will need to enter a 6-digit verification code each time they log in.
The verification code will be emailed.
Note: Workers can still use their login links to access their account.