Is There Any Way to Open Corrupted Outlook OST File?

An Outlook OST file has become corrupted and can no longer be opened normally. Outlook reports an error when attempting to access the mailbox, and rebuilding the profile has not resolved the issue. The original account is no longer available, so downloading the mailbox again is not possible. This makes the local OST file particularly important because it contains several years of emails and attachments that are still needed. Removing the file and creating a new Outlook profile would not solve the main problem because the old mailbox data would remain inaccessible. The preferred option is to extract the existing information from the damaged OST file without changing or overwriting the original file. During research into possible recovery methods, the Aryson OST Recovery Tool was found as a utility designed to recover data from corrupted or inaccessible OST files. Before using any recovery software, it would be useful to understand what types of mailbox items can actually be recovered. Can emails, attachments, contacts, calendars, sent items, deleted items, and custom folders be extracted from a damaged OST? Another important question is whether the recovered mailbox can be saved as a PST file and opened in Outlook afterward. Working with a copy of the original OST would also seem safer than experimenting with the only available file. Anyone who has successfully recovered Outlook data from a corrupted OST file is welcome to share the method used. Information about limitations, folder structure, attachments, and the overall recovery process would be especially helpful.