The Outlook Express to Outlook Conversion tool supports both methods - 1) single EML folder conversion method and 2) multiple EML folders conversion method to Convert Outlook Express to Outlook. In first method, select single EML folder of the software where all EML files are stored which you want to convert. In this method, the tool generates single PST file for all EML files from Outlook Express. But in second method, select multiple EML folders option to convert EML files. Save all EML files folders in a common folder and convert them. This method generates different PST files for each EML folder. This Outlook Express to Outlook Conversion Tool maintains the original folder structure. No validation for size of EML files to convert for this software. To Convert Outlook Express to Outlook, get the conversion tool in only 29.00 USD. You can check the capability of the tool by downloading trial version. Please mind the upgraded version that is version 6.2 and size on memory 3.31MB. It is compatible for all editions of Outlook and Windows OS.