For a business-facing software rollout, the most effective way to transfer knowledge and enable adoption is structured end-user training (D). Training ensures finance users can perform real tasks (month-end close, reconciliations, report generation) confidently and correctly, reducing errors and resistance while accelerating realized benefits. Training can include role-based sessions, hands-on labs with realistic scenarios, job aids, and Q&A, which directly supports change management and operational readiness. A support portal (A) is valuable for ongoing help after go-live, but it typically complements training rather than replacing it—users need baseline competence first. A user handbook (B) provides reference guidance, yet many users do not learn complex workflows effectively from documents alone, especially under deadline pressure like month-end. “Project documents” (C) are usually technical or management artifacts and are not designed for operational knowledge transfer. End-user training best aligns with PMP objectives for stakeholder engagement, transition to operations, and benefits realization by ensuring the intended process improvements actually occur in day-to-day use.

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