To depict the probable events, let’s take a related scenario of an Exchange Server 2003 user. When he runs a backup utility to copy the Exchange database, the operation halts with an error that reads:

“Database was not found and could not be backed up. Please make sure database exists and is mounted.”

The logs also consist of errors such as:

“Store_Name is a corrupt file. This file cannot verify.”

Or

“Access is denied. Access denied to database Mailbox Store.”

On exploring the application event log, it shows error -1018.

Cause

The root cause of the above behavior is corruption of Exchange mailbox store, most likely due to hardware issues. These errors cause checksum errors in database pages.

Solution

To resolve the problem:

1. You need to run system hardware diagnostics to find the root cause and then isolate the related issues.
2. User can create a new mailbox store and move the mailboxes from the corrupted store, to correct the database problems.
3. You can also try repairing the corrupted database using Eseutil/p repair utility. However, this command is often unrecommended because it deletes the corrupted database pages and can cause important data to delete.
4. And, for safe database repair, use an Exchange Recovery Tool. Designed to run safe scanning procedures, these Microsoft Exchange Server Recovery software can repair corrupted database and extract valuable data.

Exchange Recovery Software is a professional exchange repair tool built for fixing corruption with Exchange databases created with MS Exchange Server 2007, 2003, 2000, and 5.5. The software recovers deleted mailboxes and includes various advanced options. Compatible with Windows 7, Vista, XP, 2003, and 2000, this Exchange Server Recovery Tool extracts mailboxes in separate *.pst files.

As a practical instance, you migrate your Exchange Server 5.5 database to Exchange 2000. However, after the migration process is complete and you attempt to access the database, you encounter the below series of Event ids:

“ErrorID: 9519 Error 0xfffff9bb starting database “First
Storage Group\Private Information Store (SERVIDOR3)” on
the Microsoft Exchange Information Store.
Failed to configure MDB.

ErrorID: 1127 Error 0xfffff9bb configuring the
database “First Storage Group\Private Information Store
(SERVIDOR3)”.

)ErrorID: 1187 Database “First Storage Group\Private
Information Store (SERVIDOR3)” could not be upgraded to
version 3.2. Error 0xfffff9bb.

Error ID: 9545
ailbox /OúCILITY/OUúSNET/CN=RECIPIENTS/CN=CLIENTES
could not be found in the Active Directory during upgrade.
It has been issued GUID b035eb8b-de9a-47c6-b1f5-
309b01fcd514 and is currently disconnected.
You will need to reconnect the mailbox before allowing
the user to log on.

Error ID: 9175 The MAPI call ‘OpenMsgStore’ failed with
the following error:
The attempt to log on to the Microsoft Exchange Server
computer has failed.
The MAPI provider failed.
Microsoft Exchange Server Information Store
ID no: 8004011d-0512-00000000”

Post the occurrence of above event ids, the data saved in the Exchange Server Database becomes inaccessible.

Resolution:

The above event ids can be resolved by repairing the corrupted Exchange Server database. To effectively do so, you will need to run ESEUTIL/P command.

While in many situations, your database gets repaired using the above utility. However, if it doesn’t then you need to opt for an Exchange Server Recovery software. An Exchange Recovery software comprehensively repairs corrupt/damaged Exchange Server database in just three simple steps.

Exchange Recovery Tool is a powerful utility that repairs Exchange Server databases with ease. The repaired database is stored in a PST (Personal Storage) file format. The read-only Microsoft Exchange Recovery software is compatible with Exchange Server 5.5, 2000, 2003, and 2007.

Such problems will be more clear with the further scenario. An Exchange administrator runs a backup process for its Exchange Server Information Store database. It observes that the backup could not be completed. Further, when it views the application log, it encounters the below error written in the description section of event logged:

“Information Store (3732) 23aca049-4dfa-4e45-b2f8-64c5414a947a: The backup has been stopped because it was halted by the client or the connection with the client failed.”

The associated event ID can be 215 or 447.

Cause

Some possible reasons for the above error to occur are:

• You have installed a third-party event sink that is incompatible or being problematic
• You are using a backup application that is incompatible or being problematic
• The hard disk or hard disk controller is faulty
• You are trying to backup a corrupted Exchange database

Solution

The suggested measures to solve the above problem are:

• Uninstall the third-party event sink.
• Try to use a different backup application, preferably suggested by Microsoft like, NTBackup or try to reinstall the existing backup program.
• Check the system log for probable hard disk and hard disk controller issues. Based on the issue, perform operations like repairing hard disk by running chkdsk and installing the recent driver and firmware updates.
• Repair the corrupted database using ‘Eseutil’ hard repair commands on a backup of database. If the resultant database has some important data missing, use a third-party, safe Exchange Recovery utility. A Microsoft Exchange Recovery software can scan and repair corrupted Exchange database using effective scanning algorithms.

Exchange Mailbox Recovery is a professional utility that repairs corrupted Exchange database and extracts the mailboxes as separate *.pst files. Incorporated with deleted mailbox recovery feature, this Microsoft Exchange Recovery utility supports MS Exchange Server 2007, 2003, 2000, and 5.5.

Further is a scenario that depicts a similar situation of Exchange Server database corruption. As an Exchange Server administrator, you may observe one or more of the below symptoms:

1. You cannot start and/or Information Store service
2. Exchange clients lose the ability to send or receive e-mails. You cannot solve this issue by restarting the server
3. You restore the database from an offline backup but the database is still inconsistent. On running Isinteg utility (database integrity check), it gives the below error message on screen:

“Error 4294966746: JET_errDatabaseInconsistent”

Cause

Information Store is corrupt. Either both or one of public store and private store is corrupted.

Solution

Before trying the below steps, you are recommended to take the backup of the entire Information Store to prevent any post-crash consequences. Use the below steps in order to solve the above problem:

1. Analyze all the error message and events of application event log that Exchange reports on attempting to start the Information Store

2. Run eseutil /mh command to check the integrity of Exchange databases (Priv.edb and Pub.edb). An inconsistent database shows ‘Dirty Shutdown’ state but is not always corrupt. This state can also occur if all the transaction logs have not been committed yet.

3. Replay all the transaction log by performing soft database recovery. For this, execute eseutil /r command for the affected database(s).

4. Run hard database repair in case soft recovery doesn’t work. Run eseutil/ p command and delete all the .chk and .log files

5. Check if the previously occurring symptoms go away. If you can successfully work with the database(s), they are repaired. Next, run eseutil /d and isinteg -pri -fix -test alltests commands in sequence to defragment and fix database issues respectively.

6. In case, the problem remains the same, use a third-party Exchange Server Recovery tool to diagnose and repair the database more effectively. A Microsoft Exchange Recovery utility uses safe, yet powerful, scanning procedures and allows for easy database repair.

Exchange Server Recovery Tool is a professional utility that repairs corrupted Exchange database and extracts the mailboxes in individual *.pst files for Exchange Server 2007, 2003, 2000, and 5.5. The tool provides advanced Exchange Server Recovery features and is easy to use. It can also recover deleted mailboxes and inaccessible STM data.

New Features of Exchange Server Recovery Software:

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In a practical scenario, you may come across the below error message when you run the Isinteg -patch on MS Exchange Server that is running on Microsoft Cluster Server:

“The private store could not be updated
Reason: JET_errKeyDuplicate”

Before running the Isinteg -patch tool on Microsoft Exchange Server computer, which is running on the Microsoft Cluster Server, it is essential to set environment variable _CLUSTER_NETWORK_NAME_ to ERG (Exchange Resource Group) name. For instance, when the ERG network is named as EXCLUSTER, type the below as command prompt:

SET_CLUSTER_NETWORK_NAME_=IP ADDRESS NAME

• Here IP ADDRESS NAME is name assigned to IP ADDRESS resource in Exchange Resource Group. It is essentially NetBIOS name of exchange Server computer.

In such circumstances, the Isinteg utility fails after restore the database, which was forklifted from the stand-alone Exchange Server computer to the clustered Exchange Server computer.

The failure occurs if the value of _CLUSTER_NETWORK_NAME_ environment variable is incorrect. It can be due to typographical errors. After the environment variable is set, you can not change it.

If you have incorrectly set the environment variable on your Exchange Server database, the database corruption or inaccessibility situations may occur. In such circumstances, you must perform complete restore of the database as you can not change cluster name in information.

Inaccessibility of the Exchange Server Database (EDB) file leads to data loss situations and need Exchange Recovery to be sorted out. Recovery is best possible with the help of powerful and advanced third-party EDB Recovery Software.

These applications are particularly designed to carry out in-depth scan of entire EDB file and extract all damaged, inaccessible, and corrupted mailboxes. The Exchange Recovery tools have read-only and non-destructive conduct to retrieve your data safely.

Microsoft Exchange Recovery is a comprehensive edb recovery tool and ensure absolute recovery of all EDB file objects including emails, notes, contacts, tasks, journal, and more. The software works well with Microsoft Exchange Server 2007, 2003, 2000, and 5.5.

Consider the following practical example of such problems. You use Exchange Server 2007 and observe database corruption with the following symptoms:

• You try to copy the database, but the copy operation fails reporting an I/O error in system log, such as below:

The driver detected a controller error on \Device\Harddisk0\DR0.

• When you try to move a mailbox from the corrupted store to a new one, it cannot be accomplished with an error similar to below:

Unable to move mailbox mailbox_name.
A problem occurred while getting the properties for a message.
Parent folder name: Inbox; Message subject: RE: SND253P1 ; Error code: 0xfffffa0a.
Run ISINTEG to check for any problem in the database “First Storage Group\Mailbox Database

• As suggested by the above error, when you run ISINTEG utility to check the database consistency, you receive the below error:

MSExchangeIS (3932) First Storage Group: Data inconsistency detected in table table_num of database database_path

Also, the ESEUTIL /p repair operation fails to fix the database corruption.

Such situations indicate database corruption to an extent that it cannot be repaired and dealt using MS Exchange utilities. To extract the mailboxes, you need solutions like:

1. A database backup that can be used to restore.
2. A third-party repair Exchange Server Recovery utility that can repair and restore the database contents. An Exchange Recovery utility can use effective, yet safe, scanning algorithms to recover the lost data in intact form.

Exchange Recovery Tool is a professional utility with ability to recover mailboxes from a corrupted Exchange database in individual *.pst files. The Exchange Server Recovery application supports Exchange Server 2007, 2003, 2000, and 5.5. The tool also supports recovering deleted mailboxes and STM file data in an e-mail body.

Stellar Phoenix Mailbox Exchange Recovery v3.0 recovers STM data in e-mail body itself, which is a considerable improvement over its previous releases that used to recover it as an e-mail attachment. Also, the exchange recovery software now allows users to manually select the root Exchange Server version at ‘Select EDB File’ dialog-box with the added ‘Select Server Type’ option. The free demo version of the exchange server recovery product is available for download from company’s website that lists the mailbox(es) it can recover.

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As example, consider an instance when you experience dirty shutdown with Microsoft Exchange Server. The next time, when you try to mount the Information Store database(s), it fails and you receive errors suggesting that one or more database(s) are corrupt. You try to perform hard restore, but cannot do so and receive the below error message:

“JET_errLogCorruptDuringHardRestore -573”

The database recovery method fails and data remains inaccessible.

Cause

Error -573 indicates that Exchange Server has detected some corruption in a backup set and cannot proceed.

Solution

You can try applying these solutions to solve such problems:

1. Check for some other backup set that may be used to restore the database and carry out hard restore

2. Run ‘ESEUTIL /P database_filename.edb’ command to repair the database, where ‘database_filename’ is the name of the corrupted database file. But during repair, the command can discard table rows and even complete tables. So, it is suggested to backup the database and later, opt for safe third-party Exchange Server Recovery solutions if you find the important data missing after repair or the repair process fails.

Exchange Recovery software are result-oriented tools to that repair EDB files using safe and effective scanning algorithms. These products are applicable in each case of database corruption. You can install these products easily and then operate them using simple steps as described by the software itself.

Microsoft Exchange Recovery is a powerful EDB Recovery utility that repairs corrupted Exchange database files and restores the mailboxes in individual *.pst files. The Exchange Recovery tool supports MS Exchange Server 5.5, 2000, 2003, and 2007. The tool can also recover deleted mailboxes. The software is compatible with Windows 7, Vista, XP, 2003, and 2000.

For each event in Exchange Server, the application logs the associated entry in Windows Application log. So, you might encounter the following error message displaying in this application log, usually after unexpected stop:

“Database requires log files that could not be located. The database requires log files to continue. Make sure the log files exist. Check Event logs for more information.”

The event ID of this error in 453 and can cause database to become unmountable.

Cause

Exchange database needs some log files that it could not locate to continue. For further information on which log files could not be located, you can see the event description which mentions the sequence of log files that it could not locate. It also includes the log file number, up to which recovery has been possible.

Some prime reasons that might prevent log files from being located are:

1. The temporary folder doesn’t contain the log files. The transaction logs are missing.

2. An anti virus software is running that has quarantined the log file

3. A hardware failure that has caused log files to lose.

Solution

You need to apply these measures to solve the existing problem:

1. Check if the required log files have been moved. If yes, move them back to the correct folder. But if they have been deleted, you need to restore from the backup.

2. You need to stop the antivirus scanning if any and examine its registry settings to put back the current log files to correct folder.

3. If none of the above measures work, you should restore the database from the backup or apply eseutil repair (hard recovery) utilities to repair the database.

Eseutil hard recovery is not safe to use as it deletes the corrupted pages. Thus, you are suggested to use commercial Exchange Recovery utilities as a better option. The Exchange Recovery software are suitable choice to repair corrupted Exchange database using safe, yet effective, scanning algorithms.

Exchange Recovery Software is a powerful EDB Recovery tool that repairs corrupted Exchange database and restores the mailboxes in *.pst files. The Microsoft Exchange Recovery tool supports MS Exchange Server 5.5, 2000, and 2003. The software is easy to install and operable using simple steps that even a non-tech user can understand.

Most of the physical database corruption errors are detected by Exchange Server while operations like taking an online backup or performing database maintenance. This is because during these operations, the database engine undergoes page-wise testing of database. As a result, it logs similar errors, as mentioned below, in application event log:

1. “-510 JET_errLogWriteFail”

2. “-1022 (JET_errDiskIO)”

Cause

Each Exchange database has a 40-byte header information that stores a page number a CRC (Cyclic Redundancy Check). The database engine first determines the page number to ensure the requested one and then, checks the CRC value when reading the database page. If either of these checks fails, an error is returned, as above.

Before declaring the corrupt page, the database engine attempts to read it up to 16 times. These error indicate that either the page is bad or the database engine has failed in its trials without any success. You cannot backup the database in such cases and the operation is aborted.
Solution

You can avoid such problems by configuring a suitable hardware, device drivers, and firmware. Possible solutions to these problems are:

1. Restore from a backup, if is available and valid

2. Run eseutil /r command to find and remove bad pages from the database

The lost database pages might contain data that is important. For example, if the deleted page contains a B-tree index, it can render a considerable database part to become useless. To prevent from such situations, it is however, recommended to opt for safer Exchange Recovery solutions. The Microsoft Exchange Recovery software use intensive, yet safe, scanning algorithms to repair and restore the corrupted Exchange database.

This Exchange Recovery Software is a reliable tool that repairs corrupted Exchange database and restores the mailboxes in *.pst files. The Exchange Recovery utility supports MS Exchange 5.5, 2000, and 2003. The tool has an interactive interface that makes the software easy to operate. The tool is compatible with Windows 7, Vista, XP, 2003, and 2000.