MC4SF_PROCESS_BATCH_FINISH

What this means: Background job finishing queued Salesforce-to-Mailchimp updates failed at end of batch. Some items may have processed; others waiting/aborted.

What to do: Check Setup Apex Jobs. Review Maintenance message. Confirm Mailchimp Admin on sync user. If stuck, contact Beaufort 12 support. FAQ: What are Mailchimp Queue Items?.