A production SharePoint 2019 to Subscription Edition migration reveals things no documentation warns you about — unknown databases, 312 undocumented workflows, and a firewall approval that took 11 days. These are the 10 lessons that shaped every script in this series.
PowerShell Scripts
Post-Migration Validation: Reports, Health Cards, and Compliance Checks for SharePoint Subscription Edition
The migration window is closed, but the project isn't. This post gives you the eight PowerShell scripts and three-level framework to validate every database, compliance setting, and stakeholder deliverable — and formally close the migration.