Do you search for any software that imports your OST files data into PST? So I suggest using any third-party application for this because there is no direct method for this. Use eSoftTools OST to PST Converter Software for this. The software provides you to import all the OST files data into PST within one single conversion process. The software gives the option for saving OST files with the password after the conversion. It supports both Unicode and ANSI file formats and users didn’t need to install the Outlook application for this.