Stellar Knowledge Base

How to Migrate Thunderbird to Outlook?

 Modified on: August 4, 2023 |    38701 views

Thunderbird (or Mozilla Thunderbird) is an open source email client, which provides news and chat services as its additional features, and is available as a freeware app for multiple OS platforms. This email client has been popular in its time, featuring email management, junk filtering, extension and themes, standards support, multiple file formats support, cross platform support, and more.

Today MS Outlook has almost replaced Thunderbird and people are now looking for a way to migrate Thunderbird to Outlook. The process requires converting the MBOX file (located at: C:\Documents and Settings\Administrator\Application Data\Thunderbird\Profiles\wspaeqja.default\Mail) storing email messages on Thunderbird to its corresponding Outlook data file.

Stellar Converter for MBOX lets you perform the intended conversion of MBOX file into PST file, containing all your emails intact. To figure out how you can do it, follow the steps mentioned below to export Thunderbird to Outlook:

Step1: Go to Start menu and run Stellar Converter for MBOX, and then choose Thunderbird in the ‘Select Mail Client to be converted to Outlook PST’ window” (as shown in the screenshot below).

Step 2: In Select File/Folder dialog, click the ‘Select File’ button and browse the MBOX file stored on your computer.

Step 3: After selecting the MBOX, file to be converted, click the ‘Convert’ button to initiate the PST conversion process (as shown in the screenshot above).

The software creates a tree view of the mailbox folders at the left. Select a folder to reveal the messages it contains, and then preview them at the bottom.

Step 4: Click ‘Save’ to save converted messages.

Step 5: Choose if you want to save the converted email messages in a new PST file or Export to Existing Profile (as shown in the screenshot below).

Save to PST

Step 6: If you choose to append into an existing PST file,  select an Outlook profile or an Outlook PST (as shown in the screenshot below).

Click ‘OK’ to save the converted email messages, and then import Thunderbird to Outlook or Thunderbird converted PST file into Outlook.



4 User Comments

This software SUCKS!
I tried to convert Thunderbird to Outlook and what a brutal process.
The [Find File] process doesn't allow you to even GET to appdata\local\roaming folders where the data files reside. I even ran as admin and it still didn't let me get to the Thunderbird files.
Then is says [Load File] what file???? I tried the .msd and several other extensions as Thunderbird has a LOT of files and this stupid software just keeps saying "Invalid File". The online help is USELESS as it doesn't specify file extensions nothing....I'm uninstalling....I'll find something a LOT more useable.






Software is definitely find the mbox file as per identity of Thunderbird file in the system.

Please make sure that you have selected Thunderbird email client in software.

Further, our experts will contact you in order to resolve this issue.


Stellar Data Recovery

Not a user friendly app. unable to find thunderbirds sdb file or any file that it will recognize

Tried all said locations and no success.

uninsalling as it doesnt deliver what it promises

System: W11 Thunderbird 102





Dear Tolga,

We understand that you are not able to find thunderbirds sdb file or any file that it will recognize.

Please let us know the name of the software which you are using so we can assist you accordingly.


Team Stellar


User Comments




Stellar Converter for MBOX Stellar Converter for MBOX migrates MBOX email clients like Thunderbird, Entourage, Spicebird, Pocomail, AppleMail, Eudora, Mulberry, SeaMonkey, Netscape, ClawsMail, OperaMail, Mozilla Mail, Evolution, Sylpheed, Cone, Mutt, Gnu Mail clients into PST.

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