Data Cloud contains 1.5 million profiles while Marketing Cloud contains 2 million contacts. Is it a synchronization issue, an identity resolution problem, a consent discrepancy, or simply different populations being measured? This session presents a practical investigation framework used to diagnose profile count discrepancies across customer data and marketing platforms. Attendees will learn how to analyze identity resolution, profile creation sources, activation logic, consent management, and historical data to uncover the true root causes behind customer data desynchronization.