Hi All, I am preparing for a tenant-to-tenant migration of 60+ SharePoint lists that function as the back-end for various PowerApps. Since we are doing a staggered cutover, I need to perform an initial migration now and then run 'Delta' syncs over the next few weeks to catch new records, updates, and deletes.   My primary challenge is that SharePoint's native ID column is not preserved during manual migrations (PowerShell/CSV), which will break our App logic and Lookups. How have others handled cross-tenant list synchronization at this scale? Specifically:   How do you maintain record relationships and deep links when the system IDs change? What is the most efficient way to handle deltas across 60 lists without buying expensive 3rd-party migration tools?   thanks, Jake