Which semantic models still hit that Oracle server you're decommissioning? Who has access? Which dataflows feed which datasets? The admin portal won't tell you. Power BI Tenant Lens will. One PowerShell script, one Power BI template, 16 tables — from tenant settings to dataflow lineage chains six levels deep. This session covers architecture, Scanner API lessons, and turning raw metadata into answers for governance, security, or capacity planning. Open source, battle-tested at enterprise scale.