An OmniStudio Consultant needs to link a new Case to an existing Contact, but the...

The Data Mapper Load must resolve the related Contact record before it can populate the Case ContactId lookup field. Mapping the Contact Name directly into ContactId is invalid because ContactId expects a Salesforce record ID, not a text name. A formula cannot reliably convert a name string into a Salesforce ID. " Auto-Link " is not the correct Data Mapper Load mechanism. The proper approach is to define a lookup mapping that searches the Contact object using the available field value, then uses the resolved Contact record ID for the Case relationship. Salesforce Data Mapper Load documentation confirms that Loads write data to Salesforce objects, and related-object/link mapping patterns are used to populate lookup relationships between records. In a real project, a unique field is safer than Name because names may not be unique.

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