To recover the Exchange database and mailboxes from damaged EDB files, you can use a third-party Exchange recovery software, such as Stellar Repair for Exchange. You may also directly export the recovered mailboxes to a live Exchange or Office 365. For example, suppose the database storing the mailbox is not accessible or damaged, or the server has stopped working. In that case, you can use an Exchange server recovery software, such as Stellar Repair for Exchange, to repair the database currently on the existing server and export the recovered mailboxes directly to the new server in a few clicks. The software auto-maps source and destination mailboxes and provides an option to create new mailboxes directly from the software interface, allowing you to quickly restore user mailboxes and resume Exchange services.
For more information, you can check the Stellar Repair for Exchange Product page.