How to recover corrupted files in Microsoft Outlook format (OST and PST extensions)

This article explains how to fix the corruption of Outlook folders using Recovery Toolbox for Outlook.

The 3rd party software repairs data corruption issues in case the mailbox in use becomes not accessible for any reason. This application allows restoring all items, stored in Microsoft Outlook: emails, contacts, tasks, notes and calendars. Unlike Inbox Repair Tool, that requires some advanced technical skills, Recovery Toolbox for Outlook ( does all operations in a couple of clicks, guiding users through all steps of email recovery. Let us take a closer look at this software and make sure it can really fix the corruption of Outlook folders. Note demo version of Recovery Toolbox for Outlook is available for download. This option does not allow repairing all items from corrupted mailbox, but users may evaluate their chances for successful recovery and purchase a license if the software meets their expectations.

Click the Next button as soon as a correct path is captured, so Recovery Toolbox for Outlook suggests choosing a correct operation mode, either recovery or converter. Note it can be opened from any computer, laptop or tablet, the operating system in use does not matter. Choose a file to upload, provide a valid email address and a CAPTCHA code to proceed, click the Next Step button to continue. The system does not install anything on a local computer, all file conversion activities are done remotely, in the very end it suggests downloading already converted file that can be opened in Microsoft Outlook.

Anyway, let us test the Recovery mode locally and click the Next button to proceed.

At this stage, Recovery Toolbox for Outlook attempts analyzing a previously selected file of PST format and starts the parsing of the selected file. There are no restrictions on the size of input files.  However, note the processing of very large files will take more time. The software uses a limited amount of system resources; therefore, users may do other tasks while Recovery Toolbox for Outlook attempts recovering their mailboxes. There is no need to do anything, it automatically moves to the following stage, as soon as the analysis is completed.