ArjunMehta
Member
If you are trying to transfer emails from Google Takeout to Office 365 without losing attachments, first download your Gmail data as MBOX files using Google Takeout. Next, configure your Office 365 account in Mozilla Thunderbird by adding your Microsoft 365 email credentials. Install the ImportExportTools NG add-on in Thunderbird, then import the downloaded MBOX files. After syncing, all emails and attachments will appear in your Office 365 mailbox. For a faster and more reliable process, you can also use a professional Aryson MBOX to Office 365 migration tool, which supports bulk migration, preserves folder hierarchy, and maintains email integrity. This method reduces the risk of missing messages, corrupted attachments, or data loss during migration and ensures secure transfer of complete mailbox data.