Email is one of the primary methods of communication at workplace today, which is why most of the organizations prefer Outlook email program to maintain robust mailbox integration along with seamless support of offline access. Data files (both OST and PST files) are the backbone of Outlook as they play an inevitable role in performing flawless messaging communication.

Offline storage table is equally important for the Server besides Outlook, to maintain smooth and automatic data synchronization, even when there is instable internet connectivity. Exchange Server uses the OST files to update the changes that the user has made during the offline period and hence keeping your mailbox up-to-date, without losing a bit of information. Read more about How to Restore Lost Data When OST File Throws an Error Message: ‘Cannot open your default email folders. The file xxxx.ost is not an offline folder file’? »


OST file corruption is a common issue. To get rid of it, you can either use free Inbox Repair Tool or a third-party OST recovery software. Both the ways are efficient enough to repair and recover corrupt OST files but there are certain limitations with Inbox Repair Tool when it comes to guaranteeing complete recovery and handling severe OST file corruption. To understand it better, you must know all the basic terminologies related to OST files.

Now, you know all the basic terms related to OST files. Just like other file formats, OST files are also vulnerable to corruption. And, the most common reasons of OST corruption are: Read more about How to make severely corrupt OST files accessible? »