There are various reasons why you need to convert an OST file to PST. This guide outlines various methods to convert OST file to PST file in Microsoft Outlook. It also mentions a professional OST to PST converter tool that can convert inaccessible or orphaned Outlook data files (OST) to PST and other formats with complete precision.
An OST (Offline Storage Table) file is the offline copy of your mailbox data created by Microsoft Outlook on the local storage when the application is configured with an Exchange, IMAP, or Microsoft 365 account. This file is linked to the account or profile in which it is created. Therefore, you cannot directly open or import the OST file into another Outlook account.
