To export Outlook OST files, use SysInspire OST to PST converter software. Users may quickly export Outlook OST files to PST and many more formats, including Yahoo, Gmail, Office 365, ICS, Zimbra, EMLX, HTML, vCard, EML, MSG, and MBOX, with this software. It also quickly migrates Outlook OST files using email filtering and a mass conversion option. It is also compatible with all versions of the Windows operating system and Microsoft Outlook. You can also use this tool's free demo version.