During a coexistence period in which both CRMs remain active and can originate legitimate changes, customer information must be synchronized bidirectionally with sufficiently low latency to avoid stale records. An event-driven or near-real-time integration can propagate updates made in either system while applying field ownership, conflict resolution, idempotency, and loop prevention so that the two operational systems remain consistent. The practical benefit is that the solution remains scalable and deterministic as order volume or catalog complexity grows. Nightly batch synchronization leaves long periods in which users can operate on outdated data. Restricting updates to only one CRM contradicts the stated need to keep business-critical activity running in both environments during the transformation. A design that relies on unnecessary custom code, duplicated catalog records, or manual recovery may work for a small pilot but becomes difficult to operate at telecommunications scale. The standard Salesforce Industries capability provides the expected lifecycle hooks, data ownership, and processing semantics needed for production support. Configuration should therefore be kept as close as possible to the managed feature set, with clear dependencies and explicit conditions so that each transaction produces a predictable commercial and technical result.

Study Guide Reference:CRM coexistence; real-time synchronization; Change Data Capture/events; conflict handling; phased transformation.