If you want to migrate a shared mailbox to Office 365, you’ll need to log in with the appropriate admin credentials and locate the shared mailbox among your organization’s accounts. Once you select it, you can migrate its content into a different Office 365 mailbox. A tool like the SysInfo Office 365 Backup Tool supports this by offering a detailed folder preview, date filters, duplicate removal, and selective item migration. It lets you migrate shared mailboxes, archive mailboxes, and public folders while keeping the original hierarchy intact throughout the migration.