Eseutil/p is an inbuilt repair utility of MS Exchange Server that repairs corrupted Exchange Server databases at both table and page level. While the repair utility proves successful in repairing most of the corrupted databases, there are certain situations wherein the command fails to repair a corrupt database. In such situations, it displays an error message. This happens when the database is severely damaged. Since the database cannot be repaired, it remains corrupt, and the data saved in it remains inaccessible. To access database in such situations, a user needs to restore database from a previous online backup. However, in the absence of an updated backup, a user needs to repair the database using a Exchange Repair application.

For detailed explanation of the above problem, consider a practical case wherein your Exchange Server database gets corrupted. And, when you try to repair the database using Eseutil/p utility, you encounter:...

One of the most important objects of Microsoft Exchange that saves all the database files and transaction logs is 'Information Store'. This component, once corrupted, results in inaccessibility of all the data/information saved in database. Few most common reasons for the information store corruption are improper database shutdown, log file damage, and anti-virus scanning. An easy way to access the information store after its corruption is by using a complete backup. However, if the backup is unavailable or corrupted, then you need to search for an effective third-party Exchange Server Repair software.

As a practical case, you receive the underneath error messages while trying take a backup of your database files, using Veritas software:

“Information Store - is a corrupt file. This file cannot verify.”

On viewing the event log of your Exchange Server, you view the below error message:

“Source : ESE...

Exchange Information Store service is the most critical component, without which the server is of no use. The Information Store is comprised of different storage groups and if these groups go corrupted, it results into data inaccessibility. Further, the Information Store service also stops. In critical situations, when you cannot restore from the backup or repair it using standard utilities, an Exchange Server Repair tool is required to be used.

For example, when using Exchange Server, you might observe one or more of the following symptoms:

• You attempt to start Information Store service, but cannot do so with the following error:

“Windows could not start the microsoft exchange information store on local computer.”

• When you try to start the Exchange event service, this also fails and the following error occurs:

“Could not start the microsoft exchange event service on local computer...

If an Exchange Server database doesn't undergo proper shutdown, it remains attached to its associated transaction log stream. Exchange identifies this state of database as 'Dirty Shutdown'. This simply means all the data from the transaction log stream has not securely committed to the database files. You can examine the database state using eseutil/ mh command that examines the database header information. At next startup, Exchange detects this problem and applies the required logs to the database. In this situation if you remove the transaction logs, the database loses the ability to mount and cannot be restored unless you apply a backup or use some Exchange Server Repair utilities to repair it.

As one of the practical problems of such problems, you may find an Exchange database failing to mount. Also, you receive an error that reads similar to below:

Operation terminated with error -550...

Microsoft Exchange Mailbox Merge tool or Exmerge.exe allows you to extract mailboxes' data from an Exchange running computer and then merge it into same mailboxes stored on a different computer running Exchange Server. The tool copies the required data from the root server into .pst files and then merges it in the personal folders into mailboxes stored on the target server. At times, you cannot open the .pst files after using Exmerge.exe to extract the data to another Exchange Server database. This can occur due to incompatibility issues, new format of Outlook for PST, incorrect .pst file privileges or database corruption. As a result, the database becomes corrupt and you need an efficient Exchange Repair solution for Microsoft Exchange Server.

For example, when you try to run Exmerge.exe to move data from an Exchange Server computer to another, you may receive the below error for various users:...