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ryenduri
How to load junction object records without salesforce Id's.
If user don't want to use salesforce Id's and want to load junction object records by using Import Data Wizard with Parent record names only.
Greetings!
You can use an External ID in place of a related record's Salesforce record ID to relate or associate records to each other as you process an Upsert operation in Data Loader.
Please refer the below document for more information on the steps:
https://help.salesforce.com/articleView?id=000320964&type=1&mode=1
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Warm Regards,
Shirisha Pathuri