Complete switch from Thunderbird to Outlook: mail, address book and the Lightning calendar. Everything should end up inside Outlook's data file.
What lives where in Thunderbird and what is the path for each piece?
Export all Thunderbird data into MS Outlook data file
Solved Email & Outlook
RK
Rachel Kim December 9, 2019
2 replies
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Three data types, three paths. The mail is the big one and the other two are quick exports.
Mail: Thunderbird stores each folder as an extensionless mbox file inside your profile. Find the profile via the Thunderbird menu, Help, More Troubleshooting Information, then Profile Folder, Open Folder. Local mail sits under Mail\Local Folders and IMAP copies under ImapMail. Convert the whole directory with an MBOX to PST converter such as SysTools MBOX Converter, pointing it at the profile so the folder hierarchy carries into the PST, then attach the PST in Outlook via File, Open and Export.
Address book: covered in a thread linked in the sidebar, short version is Tools, Export to CSV from the Address Book window and Outlook's import wizard with field mapping.
Calendar: right click each calendar in the Lightning sidebar, Export Calendar, save as ICS, then in Outlook import via File, Open and Export, Import an iCalendar file and choose Import to merge. Recurring events keep their rules.
Sequence tip: do the mail conversion first since it is the long pole, and while it runs knock out the CSV and ICS exports. A complete profile usually lands in Outlook within an afternoon.
Profile folder trick found everything including an old archive I forgot existed. Mail converted while I did contacts and calendar. Full switch done in one evening.