To migrate Gmail MBOX data from Google Takeout to Microsoft 365 in bulk, you can use the Aryson MBOX Migrator Tool. First, export the required Gmail data through Google Takeout and obtain the MBOX files. Then, add the MBOX files or folders to the migration tool, select Microsoft 365 as the destination, and provide the required mailbox credentials. The tool supports bulk processing, so multiple MBOX files can be handled in a single migration workflow instead of importing emails individually.

The Aryson MBOX Migrator Tool helps migrate Google Takeout Emails to Office 365 while maintaining important email properties such as message content, attachments, sender and recipient details, timestamps, and folder structure. It can be useful for users moving large volumes of Gmail email data to Microsoft 365 while reducing the manual effort involved in converting and transferring MBOX files one by one.