If Outlook is not opening, converting an OST file to PST using manual methods becomes impossible because they depend on a working Outlook profile. In this situation, the easiest and safest solution is to use a dedicated tool like Advik OST to PST Converter. It works independently of Outlook and Exchange, allowing you to directly load the OST file and convert it to PST without opening Outlook at all. The tool preserves all emails, attachments, and folder structure, making it a reliable way to access your data even when Outlook fails to start.
How to Convert OST to PST When Outlook Is Not Opening
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