Is it possible to read Thunderbird mails in O365 on MacOS? Yes, its possible. Simply get the Mac Thunderbird Converter toolkit, it helps you to read Thunderbird Mails in O365 on MacOS by keeping complete data safe and secure. Software allows users to read or move files in batch mode to save users time while transferring huge number of mails from Thunderbird profile to O365 account. Download the free trial mode of Mac Thunderbird Converter, it helps you to convert or read 20+ files at a time.