If you are looking for a method to create multiple OST files to Outlook? If yes, then you can use a reliable and perfect professional OST Export software that helps you to convert all OST files to PST file format including all emails, contacts, calendars, tasks, notes, etc. MS Outlook installation is not required for the conversion process. There is no file size limitation, one can convert a large size OST files without any data loss. It supports all the latest and below versions of MS Outlook and Windows OS including Windows 11.