Microsoft Exchange Server uses a specific type of service, which identifies all of the resources over the network and makes those resources accessible to Exchange Server users and related applications. This special service of Microsoft Exchange Server is called Directory Service. When a Microsoft Exchange Server crash takes place, the directory service gets impacted and you have to regenerate the service. In these situations, after you regenerate the Exchange Server Directory Service, Offline Storage (OST) file on the client system could not be synchronized with Microsoft Exchange Server user mailbox and so it could not be converted in PST (Personal Storage) file. Thus, you are required to manually Convert OST to PST using specialized applications.

1-Prior to regenerate the Exchange Server directory service, all the Exchange Servers must be online and should be able to commune with one another. Otherwise, when the directory service would be regenerated on the Exchange Server database, it would take control of all the public folders or other services and thus it could not communicate with them. If you come across this situation, it becomes impossible to return to the public folder to the original server.

The procedure, which you would follow, is called the DS/IS Consistency check. It analyzes the local public and private Exchange Server Information Store database and the Directory Service database on other servers for accessing information related to the faulty server. This information could be used by Microsoft Exchange Server for restoring all of the mailboxes, site connections and directory replication connectors.

Although, this procedure helps to restore a damaged Exchange Server, but it comes with a limitation. You can not restore information of individual mailbox by regenerating Exchange Directory Service. The mailbox and the private information store might be restored. But you still be able to access the mailboxes and stored data.

In these cases, you need to recreate Exchange Server profile, which requires you to Convert OST to PST. This is best possible with the help of powerful and advanced third party OST Repair Tool.

These applications use high-end algorithms to effective convert the unusable OST file into usable PST file. These applications have self-descriptive and simple graphical interface to let you easily Convert OST File in PST. Due to read only and non destructive design of these applications, the original recovery is performed always.