Steps to convert Outlook PST files as Thunderbird :
For converting Outlook emails to select Thunderbird saving format.
Next, select the checkbox appearing next to "Date Filters" option, to save data with the particular date range.
Now, click on Browse button to choose the location to save converted files
As you click on Convert button the software will start the migration process of Outlook PST mailboxes to Thunderbird. The export process will display every detail about the conversion such as the current file progress, item count, status, size etc.
Once the tool completed with the procedure, it will show an alert window showing successful completions of migration process. Click OK button to finsh the process.
After clicking on Save Report, the software will successfully create .txt file including complete migration details of PST files on your local system. So, you can view TXT Report in Note Pad.