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Master-detail Sharing Setting on the relationship field

Key Takeaway

The Sharing Setting on a master-detail relationship field decides whether a user needs read access or read/write access to the master record to create, edit, or delete its detail records.

The Sharing Setting is an attribute on a master-detail relationship field. Detail records have no visible Owner field, so Salesforce checks their access against the master record. The Sharing Setting controls how much access to the master record a user needs before they can create, edit, or delete those detail records.

Where the Sharing Setting lives

You set the Sharing Setting on the master-detail relationship field on the detail object, not on the master object. It applies only to objects on the detail side of a master-detail relationship.

Custom object security has five levels, and the Sharing Setting is the Relationship level:

  • Tab
  • Object
  • Records
  • Relationship
  • Fields
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Given a scenario, explain the capabilities of the various relationship types and the implications of each on record access, user interface, and reporting.

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