Note that this tutorial uses screen shots from Aid4Mail Professional. You may notice slight differences if you are using Aid4Mail Home or Aid4Mail eDiscovery but generally the interfaces are very similar.
If you don't already have Aid4Mail, you can download it for free. Simply run the downloaded setup file (Aid4Mail2_Setup.exe) to install Aid4Mail. Aid4Mail will run in trial mode but all features are available, although there are some trial limitations (these are all removed if you purchase a license and activate it).
If you are running Aid4Mail in trial mode, then on the "Welcome" screen you can select which version of the software to test. Select either "Aid4Mail Home", "Aid4Mail Professional", or "Aid4Mail eDiscovery" from the "Test Edition" drop-down list. For this tutorial we are using Aid4Mail Professional. To compare each version, see the chart on our Features page.
On the Mail Source screen, select Mozilla Thunderbird in the list, then tick the "Search for mail location" box, and click the Next button.

If Aid4Mail finds the location of your Thunderbird mail, you will see "Local Folders" in the Explorer list. Make sure the "Include subfolders" box is ticked before clicking Next. Skip the Filter Options screen if you are using Aid4Mail Professional or Aid4Mail eDiscovery.

We will select the "Office Outlook PST file" option in this example. However, if you have Aid4Mail Professional or Aid4Mail eDiscovery, you may prefer to choose the "Email Profile" option instead to export your mail to an Exchange account or to your default Outlook profile.

Aid4Mail will automatically set the appropriate target folder if Outlook is installed on your computer. Choose the name for your PST file; the default Outlook profile stores email in the Outlook.pst file. If you are using Outlook 2010, Outlook.pst may be located in the "Documents\Outlook Files\" folder instead of under AppData.
Enter a name in the "Base folder" field if you prefer to separate your imported mail from existing Outlook messages. For example "Thunderbird Mail" (without the quotes).

Make sure the "Restore source mail folder structure" box is ticked. Also tick the "Append messages to target mailbox file" box if you want to add your mail to an existing PST file.

This is the last screen in Aid4Mail. First, if Thunderbird is open, close it. Then in Aid4Mail, click the Start button to begin the mail export task. Aid4Mail will display progress information as it processes your source mail. On finishing the conversion, Aid4Mail will indicate how many messages it has successfully processed.

Open Microsoft Outlook. Often the Outlook.pst file will be open by default. If not, or if you chose to convert to a different PST file, then you can open the file in Outlook through File > Open > Outlook Data File.
Browse the PST file's folder structure until you find your converted mailboxes. If necessary, you can then drag-and-drop folders or individual messages to other locations.
If you have been using Aid4Mail in trial mode and are convinced it's right for you, simply go ahead and purchase:
As soon as your order is completed, you will receive an activation code to remove the trial limitations.