Infinera migrated from a heavily customized Siebel CRM to Salesforce due to the need for improved data governance and integrations, as well as a desire for a more effective support solution. The project involved data migration of over 500 GB and creating a centralized platform for customer interactions, integrating with existing SAP and SharePoint applications. The new system enhanced user experience, streamlined processes, and provided better analytics, ultimately positioning Infinera for future growth.