When an OST file becomes orphaned, it means it is no longer connected to its original Outlook profile or Exchange/Office 365 account. Because of this, Outlook cannot open or export the file using its built-in Import/Export feature. Unfortunately, there is no direct manual method in Outlook to
convert an orphaned OST file to PST.
To convert an orphaned OST file, you need a standalone OST to PST converter that can read the file independently. Tools like the
SysInfo OST to PST Converter Tool are designed for this situation. The software scans the orphaned OST file directly, without requiring Outlook or the original email account.
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