If Outlook is not working, you won’t be able to use its built-in Import/Export feature to convert OST files to PST. Since OST files are linked to an Outlook profile, any issue like profile corruption, server disconnection, or application crash can block access to your mailbox data.
In this situation, the practical solution is to use a standalone utility such as the SysInfo OST to PST Converter Tool, which does not depend on Outlook’s working condition. The software directly scans the OST file from your system and loads all mailbox items, including emails, contacts, calendars, tasks, notes, and attachments. The process is simple: install and launch the tool, add the affected OST file, preview the data in the tree structure, select PST as the output format, choose the destination location, and start the conversion. It maintains the original folder hierarchy and preserves email details like To, From, Subject, Date, and attachments.
In this situation, the practical solution is to use a standalone utility such as the SysInfo OST to PST Converter Tool, which does not depend on Outlook’s working condition. The software directly scans the OST file from your system and loads all mailbox items, including emails, contacts, calendars, tasks, notes, and attachments. The process is simple: install and launch the tool, add the affected OST file, preview the data in the tree structure, select PST as the output format, choose the destination location, and start the conversion. It maintains the original folder hierarchy and preserves email details like To, From, Subject, Date, and attachments.