Offline Folder files (OSTs) are supposed to be the slave replicas of the server-based folders and if you wish to delete the master, the slave is orphaned. If the original Microsoft Exchange profile was not modified, then you can still start with the Microsoft Exchange client offline with the old OST file and recover the lost or corrupt data by moving the messages from the OST to a new PST file. If in case the old profile was deleted or modifies (by using it to log onto a different mailbox) then the data in OST is lost for sure.

When your Offline Store (OST) file contains corrupt information or is damaged, you will find it incapable of synchronizing your folder until you delete the OST file. Now this depicts that you have lost all the changes made while you were working offline. To resolve this issue, you need to have better OST fidelity so that you are less likely to lose on important changes that you made while working offline. Following improvements have been made in the offline store synchronization:

• Enhanced synchronization so that Outlook does not stop synchronizing messages with the server when it encounters one bad message. This is fixed by moving the message to a corrupted Items folder which does not synchronize with the server.

• Avoid synchronization of folders that are not existing on the server, namely, the IPM sub-tree, the ~MAPISP (Internal) etc

• Abstract the logging code out of the replication context structure into a replication log structure, to allow the OST Integrity Check Tool for Outlook 2000 and the synchronization code to share the same log

• Improved code for the OST Integrity Check Tool for Outlook 2000, which runs when the tool is activated.

The OST Integrity Check Tool for Outlook 2000 is devised to scan the offline folder file on your local computer and the folder file available on the Microsoft Exchange Server computer, and evaluates the items and folders present in all the folders. If in case the tool finds any differences between the files, it will attempt to correct them. This tool is used when the user experiences synchronization errors or offline folder file data integrity issues.

In situations when your OST file gets corrupt, it becomes imperative to bring it back into the usable state. This is easily possible with the use of third party Repair OST file tool. OST repair tool utilizes powerful algorithms to successfully Outlook OST Repair. With the use of repair OST file software, you can easily repair OST files and save them in PST file effortlessly and quickly. This repair OST file software utility converts OST files of Microsoft Outlook 2003, 2002, 2000, 98 and 97 and is compatible with Microsoft Windows XP, 2003, 2000, NT4 (SP6), ME and 98SE.