When importing a PST file or use the Exchange Migration Tool we have the folder "Boite d'envoi" rename to "Boite d'envoi1" and a new folder "Boite d'envoi" created. Tha active sending folder is "Boite d'envoi1". You have understand that these are French versions of Exchange and Outlook.

Exchange tool do not import the shared calendar, and we have to recreate them.