Microsoft Outlook stores different types of files. All the files are stored as PST file; the extension of Outlook file is .pst. There are two formats in which PST file are stored: ANSI and Unicode. MS Outlook 2002 and earlier versions including MS Outlook 97, 98 and 2000 stores PST file in ANSI file format. MS Outlook 2003 and later versions Continue reading How to Convert ANSI PST to Unicode?