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Larry Williams 10Larry Williams 10 

Can the AccountContactRelation object be the 'master' in a master-detail relationship?

jigarshahjigarshah
Larry,

You can neither use AccountContactRelation in a Master Detail nor a Lookup relationship.

AccountContactRelation is a standard object provided by Salesforce that enables associating a single Account with multiple Contacts. As per the documentation here (https://help.salesforce.com/articleView?id=account_contact_relationship_fields.htm&type=0)
"Contacts to Multiple Accounts lets you associate a single contact to multiple accounts through the Account Contact Relationship object. Your page layout and field-level security settings determine which fields are visible and editable"

Please do not forget to mark this thread as SOLVED and answer as the BEST ANSWER if it helps address your issue.
jigarshahjigarshah
Larry,

If the answer is helpful and has addressed your issue, please mark the thread as SOLVED and the answer as the BEST ANSWER.