Exporting Exchange OST Mailbox to PST - Version 4.5 Outlook OST tool is trustworthy and result oriented application that resume emails from OST file and get back again communication with Outlook on offline mode. You can Export Exchange OST Mailbox to PST format with all email objects and open in Outlook. This software has some excellent features other than other which is following- Scans corrupted OST files, Restores deleted emails from OST files, Export Exchange OST file as PST format, Runs on platforms of Windows, Supports all editions of MS Outlook, Try Demo version and export up to 25 OST file emails to PST format with all email objects.