A Platform Administrator assigned a custom profile based on the Minimum Access named Salesforce profile to a group of new users and assigned them…

The "Minimum Access - Salesforce" profile is a standard profile that grants the bare minimum of permissions, intended as a secure baseline. By design, it does not include the "Lightning Experience User" system permission. For a user to access the Lightning Experience interface, this specific permission must be granted. The most appropriate and scalable method to grant this access, especially when using a minimal access profile, is to include the "Lightning Experience User" permission in a permission set and assign it to the relevant users.

A. Enable the Enhanced Interface for User Access Policies.

This is not a standard Salesforce feature name. While there is an "Enhanced Profile User Interface," it only changes the admin's view of profiles and does not grant end-user UI access.

B. Add Lightning component to a layout.

Adding a component to a page layout customizes the content of a specific record page. It does not grant the fundamental permission required for a user to access the overall Lightning Experience interface.

C. Create a page in Lightning App Builder with the org as default.

This action sets a default landing page for users already in a Lightning App. It does not grant the underlying permission for users to access the Lightning Experience framework itself.

1. Salesforce Help Documentation, "Give Users Access to Lightning Experience": "To give users access to Lightning Experience, give them the Lightning Experience User permission. This permission is enabled by default for all users with a standard Salesforce profile. For users with custom profiles, you must enable this permission." This document explicitly states the requirement for the "Lightning Experience User" permission.

Source: Salesforce Help, Article 000389399, "Give Users Access to Lightning Experience".

2. Salesforce Help Documentation, "Standard Profiles": The description for the "Minimum Access - Salesforce" profile states it grants minimal data access and permissions. "This profile is a best practice for granting users the permissions they need with permission sets... It doesn’t grant access to any data." This implies critical permissions like UI access are not included by default.

Source: Salesforce Help, "Standard Profiles" documentation page, section on "Minimum Access - Salesforce".

3. Salesforce Architects, "Designing Record-Level Security for Enterprise-Scale": While discussing security models, this guide reinforces the principle of least privilege, which is the foundation of the "Minimum Access" profile. It states, "Start with the most restrictive permissions and open up access as needed... Use permission sets and permission set groups to grant users additional access." This supports the methodology of adding the "Lightning Experience User" permission via a permission set.

Source: architect.salesforce.com, "Salesforce Security Guide", section on "Designing Record-Level Security for Enterprise-Scale".