MS Outlook with MS Exchange Server provides a pleasant messaging environment in a corporate environment. There is a different profile and mailbox for each user that can be accessed with MS Outlook profile or some other email client like Outlook Express or Windows Mail. There is an exact replica of user mailbox data saved on client system in the OST file format.
OST files save the data or the work that you perform while staying offline on Exchange Server. OST file data gets converted into PST file format during synchronization. However, there are times when OST file is not converted into PST file format due to some errors in PST file while synchronization. Consequently, the data so stored in OST files become inaccessible. In order to resolve these issues, you must convert ost2pst 2007(assuming that you are using Ms Outlook 2007) with the help of ost2pst software.
In a typical working situation, when you try starting MS Outlook and synchronize the work done in OST with MS Exchange Server then you might come across the following error message:
“Cannot open your default email folders. The file *.ost is not an offline folder file.”
Here ost is the extension of Offline Storage file which is created by while you work offline on Exchange Server. This sudden behavior of OST file might just take away all your valuable email data and make it inaccessible. There might be two possible reasons behind the occurrence of this issue:
- The OST file has gone corrupt and Outlook is unable to recognize file format
- OST file related with the particular use mailbox has gone inaccessible. This issue usually arises while synchronization
These issues can be resolved with the use of ost2pst 2007 tool which is devised specifically for converting OST to PST file in Outlook 2007.