Thank you for your prompt response, Elijah. I have looked at that option and begun an attempt to use it, but I receive the error "Contact List ID Opted-out does not exist." Here is the JSON sent in AddExportContactsActivity: {
"column_names":[
"Email Address",
"First Name",
"Last Name"
],
"export_added_by":true,
"export_date_added":true,
"file_type":"CSV",
"lists":[
"Opted-out"
],
"sort_by":"EMAIL_ADDRESS"
} The documentation states to specify system-generated lists by name in the lists array, which I have done. Any idea why I receive the error? Thanks!
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