Explanation/Reference: https://help.salesforce.com/articleView?id=cpq_multicurrency_cpq.htm&type=5

* Understanding the Requirement:
* Universal Containers needs Product Option A to be automatically included with Product B during the configuration.
* Sales reps should not be able to remove Product Option A.
* Salesforce CPQ Mechanism:
* The Required field on a Product Option ensures that it is mandatory within a bundle and cannot be deselected by the user during configuration.
* Field Behavior:
* When the Required checkbox is selected for a Product Option:
* The option is always included in the bundle configuration.
* Users cannot remove or modify it unless additional automation (like a product rule) overrides this setting.
* Configuration Steps:
* Navigate to the Product Option A record associated with Product B in Salesforce CPQ.
* Select the Required checkbox and save the changes.
* Ensure that no conflicting product or price rules exist that could affect this behavior.
* Field Alternatives and Clarifications:
* Bundled: Sets the option as a part of the bundle, but this primarily affects pricing (sets price to zero) and doesn't enforce inclusion.
* Quantity Editable: Allows control over whether users can adjust the quantity but does not prevent removal.
* Selected: Preselects the option during configuration but still allows users to deselect it.
* Verification and Testing:
* Create a test configuration with Product B as the parent and verify that Product A is always included in the bundle.
* Attempt to remove Product A to confirm that it is not possible.
* References:
* Verified from Salesforce CPQ official guidelines on "Required" field functionality for Product Options.

Explanation/Reference: