Let Your Community Users, Customers, and Partners Verify Their Identities with SMS
Rolling out multi-factor authentication to your users can be a
complex process. Make it a snap with multi-factor authentication by SMS. Logging in securely is
as easy as getting a text message.
Where: This change applies to Lightning communities accessed through Lightning Experience and Salesforce Classic in Essentials, Enterprise, Performance, Unlimited, and Developer editions.
Who: Customers who have an Identity Verification Credit Add-On license can use multi-factor authentication by SMS.
How: Contact Salesforce Customer Support to enable SMS multi-factor authentication.
Then, enable Let external users verify their identity by text (SMS) on profiles and permission
sets. If this setting is enabled and a user must complete a multi-factor authentication
challenge, but they don’t have any enrolled verifiers, they are asked to verify their mobile
phone number.

