You can convert EDB file items to PST format for free using Microsoft's Exchange Server Migration Wizard. Here are the general steps you can follow:
Download and install the Exchange Server Migration Wizard: The Exchange Server Migration Wizard is a free tool provided by Microsoft that allows you to migrate Exchange server data, including EDB files, to another Exchange server or to Outlook PST files. Download and install the tool on your computer.
Start the migration wizard: Launch the Exchange Server Migration Wizard and select "Migrate to Exchange Online."
Choose the source EDB file: Select the source EDB file that you want to convert to PST format.
Choose the target: Select "Export to a PST file" as the migration type, and choose the location where you want to save the PST file.
Select the mailboxes and items to export: Select the mailboxes and items you want to export to the PST file.
Start the export: Start the export process and wait for it to complete. The time it takes to complete the export will depend on the size of the EDB file and the number of items being exported.
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