Hi Zigmunds Bībers,
Thank you for posting query in Microsoft Q&A Platform.
Using dataflows, in ADF we can perform upserts. But in this case you wanted to work with salesforce connector. In ADF dataflows, at this moment Salesforce connector is not supported. So directly using connector in dataflows it's not possible.
You can consider writing your own code to do same using databricks notebook or synapse notebooks and run that notebook as one of step in ADF pipeline using databricks notebook or synapse notebook activities.
But it's good feedback to have salesforce connector for dataflows as well. I forwarded this feedback to internal team. I encourage you to have a feedback item for same submitted using below link. Product teams closely check feedbacks and consider for future implementations.
https://feedback.azure.com/d365community/forum/1219ec2d-6c26-ec11-b6e6-000d3a4f032c
Hope this helps. Please let me know if any further queries. Thank you.
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