A damaged OST file contains several years of emails and attachments, but Outlook can no longer open it. The issue began with repeated mailbox errors before the file became inaccessible. The original email account is unavailable for synchronization, so the local OST is the only remaining source of the old messages. Creating a new Outlook profile or allowing Outlook to generate another OST would not restore the missing data. The priority is to recover the available emails, attachments, contacts, calendars, sent items, deleted messages, and custom folders from the damaged file.
Standard Outlook troubleshooting has not resolved the problem, and repeatedly attempting to open or repair the OST may risk further damage. The Aryson OST Recovery Tool is one possible option for extracting mailbox data from corrupted or inaccessible OST files. Before using any recovery software, the original file should be copied and preserved. It would be helpful to know whether the tool can preview recoverable items, maintain the original folder structure, and export the recovered mailbox to a PST file that can be opened in another Outlook profile. Has anyone successfully recovered data from a damaged OST file under similar circumstances? Experiences regarding recovery results, missing items, attachments, and PST export would be appreciated.