The customer relationship lives in Salesforce, while orders, GST invoices, stock and the legal record sit in SAP or Odoo. MuleSoft or the integration platform you already run links them, along with the data platform and any government API a service relies on. Change Data Capture and platform events keep each side current, so nobody waits for an overnight job.
High volumes, such as policy or loan records, are designed around governor limits from the first sprint: Bulk API loads, asynchronous jobs and selective sync rather than full copies. The Integrations & APIs team is responsible for the interface contracts in both directions.