To prevent unauthorized access to Salesforce accounts, multi-factor authentication (MFA) is required when users log in.
To help customers with this contractual requirement, Salesforce is making MFA a default part of the direct login process for production orgs. This change applies to production orgs created on or after April 8, 2024.
It also applies to any existing production org that wasn’t included in one of the MFA auto-enablement phases that occurred between Spring ’23 and Spring ’24. Sandbox orgs aren’t affected. Orgs that are in a trial period aren’t affected until they’re converted to a subscription.
For Related Spring ’24 Release Note Article – Click Here