If you want to retrieve your damaged OST file, so you can use Free ATS OST to PST converter software. It’s based on the latest technology and recovers email data from damaged OST file then export into PST file. You can select the Split option and divide your big OST data file into small file according to your requirement and save into cloud-based application Office 365 & live Exchange Server without facing the problem. This tool is for Outlook users who can easily recover deleted and damaged emails from OST files as PST including Emails, Calendars, Contacts, Tasks, and drafts. This supports all the version of MS Outlook from 97 up to 2019 with ease.