What happens when a user does not have access to a linked object in a junction entity with master-detail relationships?

When a user does not have access to a linked object in a junction entity with master-detail relationships, they will not see the junction object or any related records. This is due to the inherent sharing and visibility rules associated with master-detail relationships.

In a master-detail relationship, the detail (or junction) record inherits the sharing settings of its master (or parent) record. If the user does not have access to the master record, the detail record is also restricted in visibility. This means that access to the junction object is contingent upon access to the related parent objects. Thus, without the ability to access the parent records, the junction records become invisible to the user.

This scenario is crucial for maintaining data integrity and security, as it ensures that users cannot view or interact with records that they are not authorized to access, thereby adhering to the principle of least privilege.