Choices are here: https://espace.cern.ch/it-dep-is-internals/Mailservices/_layouts/15/WopiFrame.aspx?sourcedoc=/it-dep-is-internals/Mailservices/Documents/phone-migration/Migration_Wizard&action=default&Web=1&RootFolder=%2fit-dep-is-internals%2fMailservices%2fDocuments%2fphone-migration%2fMigration_Wizard