task performs a lookup-based reconciliation on the parent target object to get a parent record ID.
When the external ID is not present, the
masking
task creates a custom field to perform a lookup in the Salesforce target with the same name. A custom field lookup requires one lookup operation on the target.
The
masking
task performs a custom field lookup in the following situations:
The external ID limit exceeds in the target object.
The number of unique fields in the target exceeds the limit.