Many times, an inbuilt Scanpst.exe tool fails to overcome issue related to corruption. Corrupt PST file
cannot be repaired. A series of attempts to repair PST file remains unsuccessful. This happens in the rare cases, like when the size of Outlook PST file has size more than the 2 GB. Microsoft does not provide utility to scanpstfile size more than 2 GB. If you want to use Scanpst tool, first decrease its size. Then execute this tool. Otherwise, make use of a third party party Outlook PST repair tool.
Let's consider an error message that appears on the screen when an Outlook PST file crosses or exceeds the size limitation of 2 GB and gets corrupt. In order to get over such situation, when you try to repair the PST file with the help of a Scan PST tool. File cannot be repaired by Scanpst.exe tool. In other words, Scanpst tools fails to repair PST file in the mid and prompts an error message for you that looks exactly same as given below:
"Fatal Error: 80040900"
The above error message disturbs you on every attempt whenever you try to execute Scanpst tool on corrupt PST file.
Cause:
Above error message is seen because Scanpst tool fails to repair Outlook PST file. Generally, the tool is used to repair PST file. But due to its limited functionality, the tool fails to repair PST file whose size is greater than 2 GB.
Resolution:
Above error message can be resolved by doing possible solutions. These solutions are discussed below:
Execute PST 2 GB truncation tool to truncate the file. If you truncate the file, the size of the PST file will be decreased. After truncating the file, execute Scanpst.exe tool. It is advised to create a backup of the file before executing this tool because running this tool on PST file may lead to deletion of some valuable data.
If no results get found, go for a third party Outlook PST repair tools. These tools scan PST and brings it in repaired form. After executing one of the third party tools, Outlook PST file becomes corruption free.