Ost2Pst Converter Free is a program that can recover and convert damaged OST and PST files. These files store your email account information in Microsoft Outlook. This program will scan your hard disk for OST and PST files - you can then select the folders to recover, selecting them in the preview: this feature will show you all the folders that the program has found in the selected OST/PST file, including the email messages contained in them. You can select which messages or folders you want to include in your recovery, and then launch the process. Ost2Pst Converter will then create a new mailbox, in PST format, that you can use with your installed Outlook. You can indicate the maximum size that you want to give to the resulting PST file.
This program is absolutely free, with no database size or time limitations. It will recover all data included in selected folders as many times as you want. It can be used to recover damaged files or simply convert OST files to PST files, which are used in the newer versions of Outlook.