OST Recovery tool is also available in free demo version. It can recover and convert corrupt Exchange OST files to PST format. However, it saves only 25 items per folder. To save more number of items, you need to purchase the license of OST Recovery software.
Both OST and PST are Outlook Data Files. The first one stands for Offline Storage Table while the other one stands for Personal Storage Table. Also known as Offline folder files (OST) and Personal folder files (PST), both file formats are used to store mailbox data of Microsoft Outlook. However, they share completely different functionalities.
OST files allow you to send/receive emails and other information during offline mode. You can still work with MS Outlook if it’s not connected to the Exchange Server or there is no internet connectivity. OST files get synchronized with the Exchange Server to complete every action you performed during offline mode. OST files basically store an exact copy of Outlook mailbox on Exchange Server.
On the other hand, PST files store entire Outlook mailbox data on your system’s hard disk. PST files are basically used as backup files for Outlook. During data corruption or loss, you can use PST files to restore the mailbox data of MS Outlook.
Corruption prone nature of OST files is widely known. There are multiple factors that can lead to OST file corruption such as Exchange Server failure, hard disk failures, abrupt Outlook termination, synchronization issue between MS Outlook and Exchange Server, bad internet connectivity, virus attacks, sudden power failure or system shutdown etc. Corrupt OST file prevents you from accessing Outlook emails and other mailbox items. To restore Outlook communication, you need to repair corrupt OST files immediately.
Corrupt OST files cannot be accessed. To make them accessible and to restore Outlook communication, you need to convert corrupt OST files to Outlook accessible PST format. There are multiple things that you can do to repair corrupt OST files. You can fix OST corruption manually. Few things you need to check before fixing the problems.
Go to Control Panel >> Double-click on ”Mail’ option >> Click on ‘Show Profiles…’ >> Select the profile that needs to be removed and click the ‘Remove’ button >> Now, click the ‘Add’ button to create a new profile >> Provide the account information and click ‘Ok’ >> Done.
The problems might get resolved after performing the above mentioned steps. But, if it doesn’t, try using Inbox Repair Tool (Scanost.exe). It’s a free tool provided by Microsoft. However, the tool is programmed to deal with minor OST corruption issues only. It cannot repair severe OST corruption problems. Using Inbox Repair Tool might incur data loss as well. If manual methods don’t work in your favor, you can always use a professional OST recovery tool. As discussed earlier about making corrupt OST files accessible, Convert OST to PST tool easily repairs corrupt OST file in every condition and converts them to Outlook supportable PST format.