Repairing orphaned OST files manually can be challenging, but it is possible using built-in Microsoft tools. One method is to use the ScanOST.exe tool (available in older Outlook versions) or ScanPST.exe, which helps repair minor corruption issues. Another option is to recreate the OST file by configuring the email account again in Outlook and allowing it to resynchronize with the server. However, if the OST file is completely orphaned—meaning it is no longer linked to an active Exchange profile—this approach will not work. Additionally, manual methods can be time-consuming and may not recover all mailbox items, including emails, contacts, and attachments. There is also a risk of data loss if the file is severely damaged.

A more efficient solution is using the Exchange OST Recovery tool, which allows you to repair and convert orphaned OST files into PST format without requiring an Exchange server. This tool ensures complete recovery of emails, contacts, calendars, and attachments while maintaining the original folder structure. It supports batch processing and works with large OST files efficiently. Unlike manual methods, it provides a reliable and quick recovery process, ensuring that you can access your important data without technical difficulties or data integrity concerns.