Moving from Microsoft Outlook to Mozilla Thunderbird can be a little bit tricky. You have to migrate the calendar, address book and messages separately. These obviously have to be exported from outlook and then imported to Thunderbird.
Messages
- Moving messages from Thunderbird to Outlook Express and Outlook - An Old method
- Outlook Alternatives: Moving from Outlook to Thunderbird
- From Outlook to Thunderbird and Back Again
- Switching to Thunderbird - includes migrating messages
Address Book
Calendar
- Calendar Project - Home of Lightning and Sunbird®
- Exporting Outlook 2010 Calendar
- How do I import Outlook calendar items into Thunderbird calendar?
- Importing Calendar From Microsoft Outlook To Mozilla Lightning
- Mozilla Sunbird: Import Your Outlook Calendar Appointments
Other