Assigned To field is missing from Activities in my weekly export
|Knowledge Article Number||000188498|
|Resolution||In Salesforce, fields have two values known as the Label and API Name. The Label is displayed through the Salesforce application user interface, and is a name that lets users know what the field is for. Multiple fields on a single object may have the same label. The API Name is a unique string used by the Salesforce system to uniquely identify the field.
In data exports, each field will be referred to by its API Name, rather than by its field label. For the Activities object, the field labeled "Assigned To" will actually be called "OwnerId" in the CSV file.