Looking for a tool to convert OST files to Thunderbird software, which helps you to converts OST files to Thunderbird with attachments. This software is very simple user friendly graphical interface; anyone can easily use and work with software. This software supports all the MS Outlook editions like 2019, 2016, 2013, 2010, 2007, etc. OST to MBOX Converter tool migrate OST mailbox that including emails, contacts, tasks, email attachments, calendars, journals & etc. There is no file size limitation; you can convert number of files without any error. This software offers free demo version of OST to MBOX Converter.