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Instant Solution For Merging Two Thunderbird Profiles Data

Published By Mohit Jha
Tej Pratap Shukla
Approved By Tej Pratap Shukla
Published On August 1st, 2022
Reading Time 6 Minutes Reading

Are you looking for a quick solution to merge multiple Thunderbird profiles mailbox? If yes, then this article will help you to find the perfect technique to do so. Here, we described the step-by-step guide to merge Thunderbird profiles so as to access the collective data with minimal effort.

People tend to choose different email applications based on their requirements. There are various email applications available to use but the most convenient and compatible email clients are preferred by the users. Outlook and Thunderbird are both adequate email applications. Comparison between these two is very difficult. But, Microsoft Outlook is generally preferred for managing business-related emails as compared to Mozilla Thunderbird.

Sometimes users also want to merge two or more Thunderbird profiles and access them collectively in either Thunderbird or Outlook accounts. So, here we come up with a solution to resolve the issue for merging two Thunderbird profiles data.

Merge Thunderbird Profile With The Best Free Solution

This process involves using the ImportExportTools NG addon which is available for free in Thunderbird Extensions. So, make sure to download and install it beforehand.

  1. Open the old Thunderbird profile.
  2. Right-click on the email account and select ImportExportTools NG >> Export all folders (with subfolders).
  3. Now, save the exported files at the preferred location.
  4. Next, re-open Thunderbird with the other profile.
  5. Here, go to Local Folders, and right-click on it.
  6. Then, select ImportExportTools NG, and click on Import mbox file.
  7. Select the second option – import mbox file with its subdirectories.
  8. Choose the location where you earlier saved the old profile data and finish importing them in Thunderbird.
  9. Now, you can move the imported data into any Thunderbird account within the profile.
  10. Congratulations, the two Thunderbird profile emails are merged into one successfully.

You can also export the address books, events, and tasks from the old profile and import them into the second profile respectively.

A Scenario: Merge Multiple Thunderbird Profile & Access Them in Another Email Client

“I need an appropriate solution to merge all the data of my two Thunderbird profiles collectively and access them in MS Outlook 2016. There is no manual technique provided over the internet. So, please give me an effective and superior software to do the same. Any suggestions and help would be appreciated. Thanks in advance.”

As depicted here, there are many users who wish to merge their Thunderbird emails before migrating them all into a new email client.

Before moving forward first of all you should know why a user wants to do this. In the upcoming segment, we are going to discuss the same.

Why Do Users Move towards Microsoft Outlook?

While Mozilla Thunderbird has a lot of impressive features as already enumerated, it is not as strong as users would like it to be. As an organization expands, it needs a more powerful email client set up to meet all its requirements. The following points mainly shift users towards Outlook:

  • Thunderbird is not that much secure as compared to Microsoft Outlook. Moreover, it is very complex to add more security features to it.
  • Thunderbird does not support an in-built calendar and a task management organizer functionality.
  • The email client can not display posts and related messages.
  • Microsoft Outlook provides search filters and spam filtering techniques.
  • Outlook permits mail grouping and distribution lists feature.

Merging Two Thunderbird Profiles Data & Access Them in Outlook?

As per the above-mentioned scenario, there may come situation when a user is migrating to Outlook platform and wants to manage all his/her data from multiple profiles in single account. So, here we come up with a perfect solution that is Thunderbird Converter tool to achieve the same. With the help of this software, the problem of merging two Thunderbird profile emails before converting them to the appropriate format.

Thunderbird stores its profile’s data in MBOX file format and Outlook saves its data in PST format. Therefore, this converter software converts multiple MBOX files to PST format. This application is capable enough to export Thunderbird profiles to Outlook PST without losing a bit of data. This software facilitates an understandable user interface. So, a non-technical user can also execute the merging procedure without taking expert help. The tool is equipped with advanced features and functionalities that facilitate a safe and secure Thunderbird to Outlook conversion.

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Working Steps to Merge and Convert Multiple Thunderbird Profiles

Here, are some simple steps to execute the procedure to merge two Thunderbird profiles data. You just need to follow all the steps in sequence to get a better outcome.

Step 1: Install and launch the conversion software and select Add File option

merging two thunderbird profiles data

Step 2: Select the Thunderbird email application which is already installed in your local machine. After selecting the configured email client, click on the Default Profile Configured radio button and hit the Next button


Note: If you do not have Thunderbird installed in your system. But possess the MBOX files of both the Thunderbird profiles. Go for select file(s)/folder from file system radio button.

Step 3: Now, Process configured email identity and then this software will automatically fetch data from its default location

step 3

Step 4: Once the profile data is loaded onto the tool’s interface, add another identity by repeating the previous steps that are: Add File >> Thunderbird with Default profile Configured>>Next and choose another identity whose data you want to merge

Step 5: Both the profiles data will be displayed in the interface with multiple preview of emails and attachments


Step 6: You have to choose Export All Folders option which permits to export all the data from both the profiles mailbox. Now for successfully merging two Thunderbird profiles data in Outlook, choose export type as PST


Step 7: The tool will ask if you wish to merge all the mailboxes into a single PST. Select Yes.

merge profiles data

Step 8: Lastly, click on the Export button to start the export procedure. After completion of the merge process, click OK on the confirmation dialog box


The profiles are successfully merged as well as converted into PST format which can be imported into Outlook and accessed in a single account.

Final Words

In this article, we emphasize the best and most reliable solution for merging two Thunderbird profiles data. However, when another email client is involved like Outlook, a professional solution is the way to go. It is an effective and efficient technique to merge multiple Thunderbird profile data before transferring them elsewhere.