From Recovery ToolBox:
Download Outlook Recovery Toolbox if you encounter the corruption of user mailboxes in Microsoft Outlook format. This program suggests an easy way of e-mail restore in virtually all instances of data corruption, affecting the integrity of ost and pst files. The ease of its e-mail recovery engine allows evaluating Outlook Recovery Toolbox on all PC workstations using the Microsoft Windows operating system, it can be performed without additional guidelines, manuals and other documents. So there is no need to worry if you have already encountered the damage of MS Outlook folders and your mailbox is not accessible for any reason. Since the setup file of Outlook Recovery Toolbox is really small, the recovery of affected files can be started immediately and without the losses of Internet traffic. Please note that it does not use some kind of external data recovery services during the analysis of selected ost and pst files, all e-mail repair activities are performed on your PC only and without the usage of other services. Use the shortcut of Outlook Recovery Toolbox as soon as you install this application and start evaluating the service of e-mail recovery. The usage of intelligent and friendly user interface allows repairing MS Outlook folders by following the guidelines of Outlook Recovery Toolbox, it is much easier than other data recovery services. Besides, this application works on your PC only and does not modify corrupted e-mail folders during the analysis of corrupted documents. Outlook Recovery Toolbox guarantees the safety of all e-mail recovery activities during the processing of MS Outlook files so there is no risk to install it on your PC or any other computer in the network. After the start of Outlook Recovery Toolbox you should select a file of ost or pst format to be processed and check the path before starting the analysis. Other data recovery activities are automated, get some rest and wait until it is completed.
What's new in this version:
Version 3.1.7 added recovering Outlook 2013 PST files.
Can try before you buy, make sure anti-virus is happy, that it finds and fixes corrupted files. It will then fix 5 files per folder for free or pay for the rest. So you can make sure it will work for you before paying
After finding all of my files, I selected the option to fix 5 files per folder , just to test it out. Got error message: "Outlook x64 installed on your computer. Please repair damaged files on a computer with Microsoft Outlook x32 installed."
It might work for Outlook x32, but certainly doesn't for x64.
Current version is 2 years 7 months old.