Creating a Customer Workflow to create Phone Calls to be Assigned (Organiser) of the relevant customer's Partner. What would work for that assignment? Partner join of? I also tried {partner.id} & {partner}

Is the Assigned organizer field on the phone call record an entity field? Or just an employee field?

The field can be Employee or Partner. Seems the issue was we had the MANAGE MULTIPLE PARTNERS ON CUSTOMERS AND SALES DEALS. feature enable. Removing this now allows {partern.id} to populate.