How does event data sync between Salesforce and external event platforms?

Integrated platforms typically sync data through REST or SOAP APIs, middleware like MuleSoft, or third-party connectors like Zapier. Sync frequency varies — some platforms push updates in near-real-time, while others batch sync on intervals of 15 minutes to several hours. Each sync cycle consumes Salesforce API calls, and any field mapping errors or contact matching issues can create duplicate or orphaned records.