So, you’re migrating to Exchange 2013 Hybrid and are currently using Exchange 2010 Hybrid. Then you’ll probably run against this error mentioning the TenantOrganizationConfig when running the schema prep: setup /PrepareSchema /IAcceptExchangeServerLicenseTerms Welcome to Microsoft Exchange Server 2013 Cumulative Update 1 Unattended Setup Copying Files... File copy complete. Setup will now collect additional information needed for ...