Don’t go here and there to find software by which you can repair your damaged OST data convert into PST format, you can convert single mailboxes as well as multiple mailboxes without creating any panic situation. It also helps you to directly access your OST database into Office 365 and live Exchange server. It is available for a free trial version which enables you to access 10 email items per folder. https://www.softwarewiki.org/ost-to-pst/