Effective tool for minor issues, but for more severe corruption, advanced third-party recovery software like eSoftTools PST Recovery Software may be required. If you've accidentally deleted emails, you can recover them from the Deleted Items folder or, if they've been permanently removed, from the Recoverable Items folder in Outlook. Additionally, if your OST file becomes inaccessible, you can recreate it by syncing with your Exchange server, or convert it to a PST file using tools like eSoftTools OST to PST Converter. Profile corruption is another common issue; creating a new Outlook profile or repairing the existing one through Outlook's account settings can often resolve this.
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https://www.esofttools.com/outlook-recovery/