Using MacSonik MBOX Converter, you can easily migrate MBOX files to Office 365 mailbox.  It precisely converts and exports single/multiple MBOX files into 8+ File Formats and 10+ Email clients with attachments. The software maintains the original integrated structure of the mailbox after the conversion. This tool is capable of performing batch migration of .mbox files with or without attachments. The Date Range Filter Option of this tool helps you to filter out MBOX mails according to a specific date and convert them into desired formats. Moreover, It maintains folder hierarchy and prevents data loss during conversion from MBOX To PST.