There are several reasons for .OST corruption and some of them are File at exchange is corrupted or removed, Mishandling, Virus attack or malicious function, Dirty shutdown of Ms Outlook. But you don't have to worry about because you can easily repair your .ost data by using inbox repair tool. But in some cases this tool doesn't work repair .OST files because this method is not sufficient to complex scenarios of corruption in .OST file.
So .OST file can be recovered only with the help of third party software then I recommend you to use this Outlook .OST data recovery tool for quick and error free recovery because there is no any manual procedure to recover it. It comes up with many advanced and well developed features which add more accuracy and efficiency in this software.
It will keep safe your original data as it was before recovery. With this tool you can easily repair corrupted .ost files and convert it into outlook .pst without any hassle. Before buy any third party software just uses the demo version this Exchange .OST Recovery software. It allows you to quickly recover the first 25 item from each folder of .OST file.
Visit here:- http://www.undeletepcfiles.com/ost-recovery-tool.html to get more information about software.