Outlook OST files are susceptible to corruptions, which are majorly caused by the hard drive errors, OS crash, Outlook crash, virus attacks, or synchronization errors, etc. These errors cause the loss of email items of OST files. However, you can get back your valuable email data from the inaccessible OST file by using Kernel for OST to PST tool. Moreover, this Convert OST to PST tool embeds advanced Find feature and email filter options.