Exchange Server Blog

Exchange Servers help organizations in storing their email transactions rather being dependent on private mail servers, like gmail, yahoo or rediffmail. The Exchange database stores all the user mailboxes of the entire organization. With many business critical email transactions, including emails, contacts, notes, calendar entries etc, if the Exchange Server database encounters any problem, all the data in it becomes completely inaccessible. However, do not worry, there are many Exchange Server recovery software available in the market with which you can repair the corrupt Exchange Server database and recover your inaccessible data back.

Usually, due to virus infection, file system corruption, operating system problem or contradiction with any installed hardware/software, the Exchange Server database gets corrupt. The application event log of the MS Exchange Server contains all the entries of the events along with corresponding error reports. From the error reports, you can get to know about the exact reason behind the Exchange Server corruption.

Below is an error message that you may encounter, if your Exchange Server 2000 has been corrupt:

“Date: Date
Source: ESE
Time: Time
Category: Database Corruption
Type: Error
Event ID: 448
User: N/A
Computer: ServerName
Description: Information Store (2412) Data inconsistency detected in table Msg of database E:\Program Files\exchsrvr\mdbdata\priv4.edb (0,524957).”

In case of the above error, if you check the problem by running ‘eseutil/g’, the Exchange Server displays another error message as below:

“The Database is corrupted.”

As it is quite clear that the Exchange database has been corrupt, you need to study the event log carefully to get at the exact solution. Here, you can follow the below procedures to resolve the above Exchange Server problem:

• If you think that the problem is due to any faulty driver or hardware, try to locate it and resolve by changing the faulty hardware. Also, update the required drivers.

• If the problem persists and you are running the information store, you need to move the data from the Exchange database to a new database. In order to do this, first use the 'Exchange Mailbox Merge' utility to export mail objects to PST files. After this, delete the corrupt database, create a new database and move data to the newly created blank database by using ‘Exmerge’ command.

If the problem is still there, try to restore data from a previously created valid backup. If you do not have any recent backup of the Exchange database, immediately opt for any Exchange Server Recovery software.

Stellar Phoenix Mailbox Exchange Recovery is one of the advanced Exchange recovery software to repair severely corrupt Exchange database and recover all the mailboxes back. The software is completely reliable and with 100% read-only recovery process, it recovers the mail objects in their original format.

MS Exchange Server is one of the best server side applications developed by Microsoft Corporation. This application is used by many big industries and organizations because of its eloquent features which include high availability, support to data storage, mobile and web based access of information. Storage Group, Active Directory, and Information store are main components of MS Exchange server. There are many situations which leads to data loss in Exchange Server such server crash, hard disk failure etc. To avoid such data loss problems, you need to create backup of your data regularly. Exchange Server uses .bkf file extension to save data as backup. A backup file of Exchange server data contains following three files:

• EDB (Exchange Database Files)
• STM (Streaming Media Files)
• LOG (Transaction Logs)

Importance of Exchange BKF file:

A BKF (Backup) file helps the users to restore their original data when Exchange server fails to work or in disaster situations or there are some problems on Server. It also help you to save a lot of time and work.

Reasons for Exchange Backup Files corruptions:

Following are few causes for the corruption of Exchange BKF files.

• Virus infection
• Backup interruptions
• Missing catalogue files
• Suddenly damage of System software and hardware
• Some corrupted items are backed up during online backup process.
• Backup software malfunctioning

Although Microsoft has provided a decent built-in utility, called NTBackup, to backup and restore the data in Windows environment. However, there are some limitations of this tool like:

- The tool is not designed for large volume of Exchange Server data.
- It behaves the same during both the corrupt and the error free backup.
- Generates error during the restore process if it fails to read the backup file due to the corruption.

Unfortunately, there is no built-in program or any other utility designed by the Microsoft to fix the corrupted/damaged backup files. There are some third party Exchange BKF repair software in the market which are developed to repair and recover the damaged or unrecoverable Exchange .bkf files. One such tool is Stellar Phoenix Exchange BKF Recovery. This software effectively repairs corrupt or damaged BKF file of Exchange server and retrieve .edb, .stm and .log files completely. These files can be directly restored to the Exchange Server. The tool is compatible with Exchange Server 2003 and 2007 versions.

With implementations of MS Exchange Server, emailing process of organizations has been faster and more efficient. Now, organizations do not need to depend on the services of third party email services providers and can have the mail servers hosted at their own place. MS Exchange Server has given organizations the freedom to manage and maintain their on-line business smoothly and thus has created a great deal of dependability. With a huge volume of precious emails, calendar entries, notes, contacts, journals etc, Exchange Server has inbuilt security mechanisms to resist various instances of failure. Still, there are few instances of Exchange Server crash, which you cannot avoid. For such situations, there is much innovative Exchange Server Recovery software available in the market.

Every instance of Exchange Server failure is different from the other and flashes an altogether different set of error message. However, as an administrator I know that it is the problem behind the error message that matters the most rather than the error message. It is a matter of fact that for a number of error messages indicating an Exchange Server failure has the same piece of solution.

Let us see one common problem in case of MS Exchange Server 2003. There are situations, when the Exchange Server suddenly behaves abruptly and even fails to start. In such a case the application event log shows the following error log:

After getting the above error log, if you try to mount the public folder, it shows an error message as below:

“The database files in this store are corrupted”

Cause:

There can be a number of causes, which are responsible for the corruption of the Exchange Server database, including unsystematic system shutdown, file system corruption, operating system failure, application malfunction etc.

Resolution:

For such situations, Microsoft has suggested a wonderful application, 'ESEUTIL'. You can run the 'ESEUTIL/p' command on the troubled Exchange Server database to repair the corrupt database and recover the mail items.

In case of severe corruption in the Exchange database, this 'ESEUTIL' utility fails and you can take the help of the highly appreciated Exchange Server recovery utility, Stellar Phoenix Exchange Server Recovery. This utility is extremely powerful to fix Exchange Errors and recovers inaccessible data from even the severely corrupt or damaged Exchange Server database. Moreover, the utility is reliable and you can use it without worrying for the safety of your data in the Exchange Server database.

The SRS or Site Replication Services is required when the migration from the Exchange Server is intended. This is a service which is responsible for exchanging the directory information between Exchange Server 5.5 directory and Active Directory.

The SRS uses the remote procedure calls and is able to replicate the directory data among different Exchange or SRS Servers. This uses the transactional logging JET database, Srs.edb which is located at exchsrvr\srsdata folder.

Now the corruption of this database is quite troublesome, specifically from administrative point of view. The SRS in this condition may not work properly and thus EDB Recovery is must.

The reason of this corruption can be many like if you deploy the anti-virus scanning to the srsdata folder, then the corruption may be encountered. So this is better to always have backup of this database, online backups are recommended. The servers which have SRS can backup it through NTBackup. But sometimes this may be problematic and you can’t backup it properly. You may get few error messages in this regard or the backup appears to be perfect but when you desire to have Exchange Server recovery, you get error messages like:

“Unable to open file. (FILE=C:\Program Files\Exchsrvr\srsdata\srs.edb, EC=SHARING VIOLATION) and FILE=C:\Program Files\Exchsrvr\srsdata\temp.edb, EC=SHARING VIOLATION”

In this corruption scenario, the use of the Eseutil, the inbuilt utility to have Exchange recovery is not recommended either. You can only perform the consistency check through it. So what is the alternative for Exchange recovery? Well, you can use EDB recovery software for this purpose which make a complete scan of the affected database and retrieve the data intact.

These Exchange Server recovery products retain the powerful features and qualities to have the repaired database. They come for the different file versions of Exchange Server and never alter the content of the file due to their read-only nature.

Stellar Phoenix Mailbox Exchange Recovery software is the wonderful tool to have guaranteed EDB recovery. The software supports Exchange Server 5.5, 2000, 2003, 2007, and 2010. This Exchange recovery product can also recover the e-mail addresses from Active Directory storage.

The user interface of this utility is quite intuitive and thus the user needs not be too technically expert to handle the software. Just the few clicks of mouse will give you the effective results of EDB recovery.

When you attempt to mount the public store or a mailbox on MS Exchange Server, you may come across the following error message:

“An internal processing error has occurred. Try restarting the Exchange System Manager or the Microsoft Exchange Information Store service, or both. ID no: c1041724”

Additionally the following information messages and an error may be logged in the Windows Application
Event Viewer:

Event ID: 465
Source: Ese98
Type: Error
Computer: Server1
Information Store (2184) Corruption was detected during soft recovery in log file C:\Programme\Exchsrvr\mdbdata\EDB00000E8.log. The failing checksum record is located at position 6531:471. Data not matching the log-file fill pattern first appeared in sector 6600. This log file has been damaged and is unusable.
For more information, click http://search.support.microsoft.com/search/?adv=1.

After this error, everything stored on the Exchange Server becomes inaccessible and you may fall in a grave situation.

Grounds of the trouble

This problem is the possible cause of the corrupted transaction log file. For instance, if the events that are mentioned above, then EDB00000E8.log file is damaged. The Event ID 465 error messages are the specific indicative of the corruption in EDB file.

Nevertheless the reason of the problem, the ultimate result will be the data loss and the EDB file has got damaged and can’t be accessed by any means. For saving your precious data, it becomes mandatory to repair and restore the database.

The database repair is feasible in a quick and easy way, known as EDB Repair. Exchange database repair is carried out using the third party applications known as Exchange Server recovery software.

Exchange Recovery software are the third party applications, specially designed to repair and restore the damaged EDB file in all possible cases of corruption. These software are fairly easy to use and perform fast EDB recovery to save you and your business.

Stellar Phoenix Mailbox Exchange Recovery is the most excellent result giving and the robust recovery application for the corrupt database files. Having the wonderful power of scanning the damaged EDB file and repairing it, this software can address all the EDB corruption issues.

Performing Exchange recovery using this software is extremely easy as it have an intuitive and cool looking user interface with prosperous graphical support. This EDB recovery software is designed read only and non destructive and thus it doesn’t perform any write operation to the corrupted EDB file.

In database management technologies, a rollback is a process that returns the database to the some previous state. It is important for the integrity of database, because it means that database can be restored to a clean copy after some erroneous operations are carried out.

The rollbacks are critical for recovering from the database corruption and server crash; by rolling back the transactions which were active at the time of server crash, the database is returned to the consistent state.
In this way, you can see the importance of database rollback, but sometimes it could be dangerous for the database. An inappropriately handled rollback operation on the Exchange Server database could result into the database corruption.

The database corruption might lead the Exchange Server Information Store Service to terminate unexpectedly and shows some sort of access violation error messages. If the correct Exchange Server and Windows NT debug symbols are installed, the resulting log may show a stack dump like following:

FramePtr RetAddr Param1 Param2 Param3 Function Name
3f9ceb48 6feaf887 3f9ceb58 133f48b0 00000000 ESE!ErrNDSeek+0xb({...})
3f9ceb6c 6feb0010 10816f40 fffffed4 3f9cebf4 ESE!BTISeekSeparatorKey+0x48
......

After this problem, all of the data stored on the Exchange Server EDB file becomes inaccessible and you may face the nightmare of data loss.

Cause of the trouble

When the fundamental Exchange Server database engine attempts to rollback the conception of a LV (Long Value) tree on the table, opened with exclusive access, the database gets damaged. In such cases, the rollback is only partly successful.

Work around of the issue

The database corruption can be fixed only by repairing and restoring the database using appropriate tools. EDB repair is possible through the third party applications known as Exchange Server recovery software.

Third party or commercial applications are the easiest and quickest tools to repair and restore the damaged EDB file in each and every case of corruption. These software are fairly easy to use and don’t demand any sound and prior technical knowledge to carry out EDB recovery.

Stellar Phoenix Mailbox Exchange Recovery software is the best EDB recovery software till now. This software is capable of recovery all the objects of Exchange Server database from all file versions of Exchange Server. Using this Exchange Server recovery software is very easy and it performs original EDB repair in all cases.

Now-a-days it has become very common for most of the organizations to use Microsoft Exchange Server as an email server application for improving their communication medium and because of its robust and user friendly features. MS Exchange Server is developed by Microsoft Inc. to facilitate and manage business data like emails, calendar events, meetings, contact ids, attachments, task and many more.

Many times it occurs, while working with Exchange server suddenly your database failed to mount due to some unknown reasons and an error message is displayed on the screen. Some common errors of Exchange server are: Exchange error 550, Exchange dirty shutdown error, Exchange 1601 error etc.

Here we are going to talk about Exchange database error 1601, situations in which this error occurred and how we can sort out it. The syntax of this error is given below:

"Operation terminated with error -1601 (JET_errRecordNotFound, The key was not found) after 2.354 seconds.”

Causes:-

This error generally occurs either when using an inbuilt utility for analyzing and repairing database but the version of utility is not ensuring about it Or the structure of EDB File and STM file is different from each other. Other possible cause for this problem could be the severe corruption in Exchange database file structure.

As a result your Exchange database will not respond and your precious data becomes unreachable to you.

Solution:-

Try to get latest service pack of your server application. If it does not fix your problem and you are still in trouble, go for any efficient third party tool. In the market many affordable or user friendly professional tools are available for Exchange Recovery which help to easily work around any corruption issue.

Stellar Phoenix Mailbox Exchange Recovery is one such award winning application to repair and recover data from damaged Exchange information databases. This software is compatible with all versions of MS Exchange Server. This is the highly recommendable application to deal with all type of Exchange error codes, arising due to the corruption in Exchange database files. This utility extensively analyzes the damaged database and restores inaccessible mailboxes into separate .pst files.

The backup utility of Windows that is NTBackup is not only useful to create the backup of Windows data but it is also a boon for all Windows users who use MS Exchange Server as their email server because by NTBackup, they can create the backup of their Exchange Server mailboxes also. However, the backup of Exchange Server by NTBackup is different from usual Windows backup as Exchange backup file has .BKF file extension and it contains .stm, .edb, and .log files of MS Exchange Server. Indifferent from various other files of Windows, a .BKF file too is prone to corruption. At that situation, to repair .BKF file, it is advisable to use third-party Exchange BKF recovery software.

There are various reasons responsible for Exchange BKF file corruption, some of which are:

• Interrupted or faulty backup process is one of the major causes of Exchange BKF file corruption.
• Virus infection in the system is another cause for Exchange BKF file corruption.
• Abrupt system shutdown can also corrupt Exchange BKF file.
• Faulty Windows backup software can corrupt Exchange BKF file.
• Missing catalog file is one more cause responsible for corruption of Exchange BKF file.
• Exchange BKF files corruption due to CRC error.

Aforementioned are some of the most common reasons responsible for corruption of Exchange BKF file however, there could be various other reasons which may corrupt your BKF file. Mostly when Exchange BKF file gets corrupt, it starts throwing error messages. Let us discuss some of the common error messages which a user encounters when he/she tries to extract/restore data from corrupt Exchange BKF file:

• “An inconsistency was encountered on the requested media”
• “The fixed media is full. You cannot back up all of the specified data to this disk device. The backup operation will stop”
• “The backup file is unusable. You must erase it, or choose another file.”
• “The backup file contains unrecognized data and cannot be used.”

So, if you are the one who is getting any of the above mentioned error messages or whose BKF file is corrupt then don’t panic, use an efficient third-party Exchange BKF repair software like Stellar Phoenix Exchange BKF Recovery software and repair your precious Exchange BKF file.

This software efficiently repairs corrupt or damaged Exchange BKF file and recovers .edb, .stm, and .log file, searches for the BKF file in the specified file and folder as well as saves scanned information so that the files can be repaired later. In addition the software supports MS Exchange Server 2007 and 2003.

Today, corruption of data on Exchange Server is a common issue which can happen anytime with Exchange Server. This makes the entire database inaccessible and user is unable to fetch the data until it is repaired. This problem can be solved easily with the help of Exchange database recovery software.

Microsoft Exchange Server is an e-mail communication server developed by Microsoft for Outlook and other e-mail clients. When you work on Outlook, all the data is synchronized with Exchange Server. At times, you may face issues while synchronizing data with Exchange Server which usually happens due to corrupt database. However, an EDB file can get corrupt due to any of the following reasons:

• Logical corruption of Exchange database
• Antivirus software has quarantined the database file
• Exchange Transaction log files are damaged

An Exchange Server stores the entire user mailboxes in an Exchange Database file which is also known as EDB file. In order to repair the corrupt database file, you can use inbuilt utility i.e. ‘Eseutil’ to repair the corrupt EDB file. To repair the corrupt database using this utility, you need to use the following command:

“ESEUTIL /P database_filename.edb”

Where ‘database_filename’ is the name of EDB file or Exchange Server database.

After using this utility, if you are still unable to repair the database then you can restore the database from a recent backup. However, if you do not have a backup or the backup is not valid then you may have to shut down the server which can cause loss of productivity in an organization.

In such situations, you need to repair the database quickly in order to avoid loss of productivity and the same task can be done with the help of a third-party Exchange database recovery software. These software can help you to safely repair Exchange Server database (.EDB) file and restore the recovered data in a .PST file that can be easily imported to MS Outlook.

One of such software that allows you to easily repair the corrupt EDB file is Stellar Phoenix Mailbox Exchange Recovery. This Exchange repair software is available with a free demo version so that you can easily check its functions and working. Moreover, this tool allows selective recovery of user mailboxes including all Outlook items like emails, tasks, calendar items, appointments, etc.

Information Store Database is considered the primary component of Microsoft Exchange Server that keeps all user mailboxes. Sometimes, this Information store becomes corrupt and subsequently, fails to mount. The potential causes responsible for Information store corruption include virus infection, hardware problems, database engine failure, etc. As a consequence, all the user mailboxes become inaccessible. Corruption badly affects the overall working of Exchange Server. Dealing with Exchange server database corruption is a cumbersome task for an inexperienced user.
But nowadays, several Exchange server recovery tools are available that make this job more facile and effortless.

Consider a practical case, wherein you try to send e-mails to a distribution list. However, these e-mails remain in the local delivery queue of the MS-Exchange 2000 Server. Due to this behavior, e-mail cannot be delivered to the recipient side. Numerous efforts end with no successful result.

Reason for the occurrence of above problem is that one of the recipients has a corrupt or damaged mailbox.
For solving the above issue, first of all be confirm about the fact whether a corrupt or damaged recipient mailbox is the reason. After confirming, try to delete the corrupt or damaged mailbox of recipient. To confirm the existence of a corrupt mailbox, delete the user that is linked with the corrupt or damaged mailbox from the distribution list. Then, send a test e-mail to the distribution list. If the e-mail message remains undelivered, this means that the mailbox is corrupt or damaged.

After checking that the mailbox is corrupt or damaged, simply delete the mailbox with the help of any of the below methods:

• Transfer the corrupt or damaged mailbox to some other mailbox store.

• Export the data of damaged mailbox to an Outlook PST file, remove the original mailbox, create a new mailbox, and then again import all data to the newly created mailbox.

• Repair the corrupt mailbox using the Isinteg -fix command by following the procedure given below:

1. Select Start >> Run, enter cmd in the Open box, and then select OK.
2. Navigate to the 'ExchSrvr\Bin' folder and run the below command: isinteg -s -fix -test alltests
3. Enter the number of the corrupt or damaged mailbox store, and then press ENTER.
4. Press Y and then ENTER. However, if the problem still persists, then you should take help of a third party Exchange Recovery tool.

A number of EDB repair utilities are available that incorporate advanced techniques to easily recover user mailboxes from any corrupt EDB files. Stellar Phoenix Mailbox Exchange Recovery is an adroit utility that safely repairs corrupt Exchange server databases to recover emails, contacts, notes, tasks, and other precious mailbox items. Furthermore, the software is compatible with Windows 7, Vista, Server 2003, XP, and 2000.

Corruption issue in Exchange Server database files is fairly common occurrence. Many factors, like unexpected system shutdown, malicious virus, human errors, power outage, etc. Corruption of Exchange Server may fall you into a grave problems. Loss of Exchange Server data is one of the symptoms that are observed after the corruption of Exchange database. A latest backup helps you to gain access of data again which you have lost due to corruption. In case of unavailable backup, you have an option of a third party tool.

Sometimes, it happen Information Store service remains unstopped when Exchange Server 2000 or Exchange Server 2003 is in use. Along with failure to start Information Store service, it throws an error message that looks exactly same as given below:

“1067 The information store terminated abnormally.”

Moreover, the below stated event ID is seen in the application log of Windows Event Viewer:

“Date: date Source: ESE

Time: time Category: (12)

Type: Error Event ID: 447

User: N/A

Computer: Servername

Description:

Information Store (nnnn) A bad page link (error -327) has been detected in a

B-Tree (ObjectId: 19, PgnoRoot: 113) of database E:\Program

Files\Exchsrvr\mdbdata\priv1.edb (3440582 => 3443648, 3443232).”

Cause:

Hardware failure or antivirus scanning of the database file directory is the responsible reason for the occurrence of above error message. Event ID 447 recognizes that the structure of the logical database has become corrupt. Logical database get corrupt for one or more of the following reasons:

· Disk caching has not committed transactions to the hard disk and the server has stopped working.

· Replay of wrong log files at a time of a restoration of database.

· Bad hard disk controller in a server.

· Removal of database log files that were partially committed to the database.

Solution:

In order to overcome this problem, try to restore the database from an online backup. If no backup has been maintained by you, then the only option left for you is to repair the corrupt or damaged Information Store database. Below are the steps to repair the information store database:

Open the Information store service if it is not already started.
Open Exchange System Manager, and then dismount the corrupt private database.
Execute the eseutil/p command for the dismount database file.
Backup the original database files.
Open Exchange System Manager, and then mount the Exchange Server database.
Dismount the database.
Execute isinteg -s servername -fix -test alltests command at the command prompt for the problematic database.
Open Exchange System Manager and then mount the database.

It might be possible that Exchange Server database remains not repaired, even after performing the above steps. So, in such situation it is advised for you to opt for third party Exchange Server Recovery software. A lots of software have been introduced that performs the job of Exchange Recovery with much ease and instantly. After the use of any of such product, data of all the Exchange Server objects, such as contacts, attachments, appointments, journal, tasks, events, etc gets recovered. A third party tool is an apt solution for inaccessibility of data. A help file comes along with the software that guides you how to perform recovery with these tools.

When corruption strikes Exchange Information stores, you may run across a range of problems while trying to access your database files. The Information store service may quit unexpectedly, the service may stop responding at startup, or you may lose your mailbox data. Logical corruption in Information stores may be triggered due to myriad reasons, such as transaction log files are missing or are corrupt, Information store database exceeds 16 GB, or an antivirus scan has damaged the store files. The following list describes the reasons responsible for causing logical corruption in Exchange databases:

Deletion of EDB.LOG file:

The ‘EDB.LOG’ file may contain some committed or uncommitted transactions. If this file is deleted, some changes will never be committed to the database. This may result in various problems, such as partially-moved messages or internal inconsistency in one or more B-trees. This may render your Exchange database logically corrupt

Write-back Caching:

Logical database corruption may also happen when you run an unprotected write-back cache against the log drive. If there is a power surge, the data in the unprotected write-back cache is erased. Usually, if the data is written to the log disk, Extensible Storage Engine commits the transaction and flushes the changes to the database page on the disk. If no data was written to the log disk, the database cannot be restored to its original state (the state before corruption) by the recovery process. In order to avoid this, you can protect your cache with a battery backup. You may also use some error corruption procedures.

Using ESEUTIL /P

The Eseutil /p command repairs the database by deleting some data and results in inefficient space usage in the database. To get rid of wasted space, you can perform offline defragmentation of the database using ‘ESEUTIL /D’. You should also run an integrity check against your database using ‘Isinteg -fix’. This will repair all the damages at the Store-level that were introduced by the repair process.

If your database gets logically corrupt due to any of the aforementioned reasons, you should take help of professional Exchange Server recovery software. These competent tools perform comprehensive scan of the corrupt Exchange database to recover all inaccessible user mailboxes. With the help of these utilities, you can repair and restore Unicode-formatted EDB files. In addition, they support close recovery of databases created in MS Exchange 2010, 2007, 2003, 2000 and 5.5

Exchange Server databases consist of messages and directory information. To maintain the consistency of these databases, it uses a reliable and transactional database engine called JET. The engine has been optimized to support transaction-based processing. It implements disk caching by continually swapping pages of size 4KB between RAM and a dedicated swap space on the disk. It makes changes to the pages in memory and then writes them back to the disk. This results in improved efficiency as data is buffered in the memory itself eliminating the need to access the disk over and over again.

Caching is an effective of processing data. However, this has a downside. The data that resides on the disk is never completely up-to-date. If there are bad pages in the memory, the Exchange database may become inconsistent. Further, if the server crashes before the contents of the memory are transferred to the disk, you will lose your valuable data. To avert such disasters, MS Exchange uses transaction logging. In the event of a crash, you will be able to recover data up to the last committed transaction using transaction log files. These files keep track of all changes (i.e. inserts, deletes, and updates) made to the database and keep a copy of data processed in the memory.

Exchange databases typically experience two types of corruption, i.e. physical corruption and logical corruption. Physical corruption occurs at the lowest level and is often caused by hardware failures. On the contrary, logical corruption may happen at the database level (index entries referring to invalid or missing values) or at the application level (damaged items in mail folders, corrupt messages, etc.). Physical corruption can be detected through online backup tasks that involve checking every single page in the database. You can use the ‘Eseutil /p’ tool that comes with the Exchange Server to repair physical database corruption. Logical corruption, which is usually caused by software bugs, can be fixed using ‘Isinteg’ utility. The ‘Isinteg’ tool runs at the logical schema level and recovers data that cannot be recovered using the ‘Eseutil’ utility.

In case the MS Exchange inbuilt utilities fail to repair corruption in your database, you should take help of professional Exchange database recovery software. With the help of these tools, you can repair severely damaged databases and restore them to their original consistent state. They support recovery of Unicode-formatted Exchange database (‘.EDB’) files. Moreover, these utilities are compatible with MS Exchange 2010, 2007, 2003, 2000, and 5.5.

MS Exchange Server is run by many organizations which primarily use Microsoft infrastructure solutions. Exchange Server can effectively meet the data storage requirements of big organizations and provide them with several advanced features, including email messaging, calendars and tasks sharing, web-based information access, etc. But as any other database, Exchange databases are vulnerable to corruption. Exchange corruption may occur in two different forms, i.e. 'Physical corruption' and 'Logical corruption'. The physical corruption is result of damage caused to the database structure. However, if the data inside the database becomes inconsistent, you encounter a case of logical corruption. Both types of corruption may cause some serious data loss on your Exchange server computer. To effectively work around this problem, you need to go Exchange Server Recovery through a reliable third-party tool.

There is always a risk that logical corruption can replicate. However, certain methods can help you easily handle cases of logical Exchange database corruption:

• In order to recover a single item, you can the advanced 'Single item recovery' feature in Exchange. This eliminates the need to restore complete mailbox data using a point-in-time backup.

• You can try moving your mailbox to remove all the damaged or inconsistent data.

• Additionally, the 'Calendar Repair Assistant' feature helps you resolve issues with the calendar appointments for all user mailboxes on your server.

• You can take help of the 'New-MailboxRepairRequest' cmdlet for detecting and repairing corruptions associated with search folders, folder views, item counts, etc.

The most frequent problem faced by Exchange users is the dirty Exchange shutdown. Exchange uses a transaction-based messaging mechanism for ensuring data consistency. The database engine writes all changes made to the data to the transaction logs. These changes are committed to the database after ensuring that the data is free from failures. But in case of a dirty shutdown, all the changes cannot be committed to the Exchange database and hence, the database is marked as 'suspect'. In such situations, you can use the 'Exeutil' tool to check your information store and repair any damaged databases. In case you are unable to perform EDB recovery, you can use professional third-party software.

Stellar Phoenix Mailbox Exchange Recovery is a robust tool that enables you to safely repair damaged database files of Exchange Server 2010, 2007, 2003, 2000, and 5.5. The competent tool allows selective recovery of user mailboxes from the corrupt EDB file.

To keep safe and secure important data from any accidental deletion, corruption, or damage, Exchange Server administrators make a full backup of their Exchange Server databases on regular basis. To perform this task, they use inbuilt backup utility or go for a third party backup tool like VERITAS. However, there are certain cases when administrators attempt to restore the file and receive an error message stating that there is no data in the backup file. This situation primarily occurs when the database is corrupted or damaged, and does not allows the user to access any data saved in the .edb file. In such situations, the user needs to opt for an advanced Exchange Server Repair application that can repair the corrupted .edb file.

Consider a practical scenario, where you created an Exchange database backup and when you attempt to restore the same backup, you receive an error message:

“No Entries Found”

The backup log automatically triggers after the above error message, stating:

“Backup of "SBS\Microsoft Information Store\First Storage Group"
Backup set #4 on media #1
……
……..
Files: 0
Different: 0
Bytes: 607,167,376
Time: 3 minutes and 9 seconds”

Cause:

The above error message occurs when:

The Exchange database file is corrupted.
Backup process was unsuccessful / incomplete.
The media on which the Exchange database file is stored is corrupted.

Resolution:

To repair the corrupted exchange database, you need to run ESEUTIL/P command. However, if the database remains corrupt even after running the above command, then you need to repair it using a third-party Exchange Server Repair application. These tools ensure complete repair of MS Exchange database post any logical crash.

Stellar Phoenix Exchange Recovery is a powerful, yet easy to understand application that repairs database created in Exchange Server 5.5, 2000, 2003, 2007 and 2010. The repaired database files are saved in .pst files format. The read only Stellar Exchange Server Recovery application has been designed for Windows 7, Vista, XP, 2003 and 2000.

Backup is an easy and smart solution to fight data loss in an event of corruption or similar vulnerability. It is a preventative measure that is a part of your contingency plan for a disaster scenario. In order to sustain your current growth and continue with your daily operations, key business data needs to be protected. So, backups play a significant role in your overall success. However, this is not always true. These backup files may get corrupt and render your data inaccessible.

In Windows, backup archives are created using the NTBackup.exe tool and carry the extension ‘.BKF’. They can also be created using Symantec Backup Exec. Similarly, Exchange users backup their databases with Windows NTBackup utility. By default, NTBackup software is installed on Windows 2000 Server and Windows Server 2003 computers. If you install Exchange 2000 Server or Exchange Server 2003 on these machines, the tool is automatically upgraded to backup Exchange databases. Exchange BKF files typically consist of user mailboxes, STM attachments, and LOG journals.

The BKF file format may get damaged owing to a number of variables, such as virus infection, interruption of the backup process, CRC (Cyclic Redundancy Check) errors, hardware failure, abrupt shutdown of the system, etc. These situations may lead to permanent loss of data because of corruption of the Exchange BKF file. You may encounter errors while trying to restore corrupt backup files as shown below:

‘The backup file is unusable or is deleted’
Or
‘Failure to open file’

A majority of these corruptions are related to bugs while the others stem from already corrupt hard drives or damaged files. If your backup file grows larger and larger, it becomes susceptible to corruption. Microsoft does not provide any inbuilt tool that can repair and recover damaged Exchange backup files and safeguard all your crucial Exchange data.

However, you will find a range of professional Exchange BKF repair tools in the market. With the help of these advanced utilities, you can easily fix corruption in your Exchange backup file and regain access to your mailboxes, storage groups, public folders, and other items in your BKF file. These software recover corrupt ‘.edb’, ‘.stm’, and ‘.log’ files from the backup. You also get a choice to save the scan information of the BKF repair process and perform Exchange backup recovery at any convenient time. Using these utilities, you can repair large backup files of MS Exchange Server 2007 and 2003.

MS Exchange Server, an advance and powerful application designed by Microsoft Corp., employs a tool called Eseutil/mh utility. This command line tool is run to check and verify the state of an Exchange Server database (.edb) file. It checks and identifies whether the last performed shutdown of Information store database was dirty or clean. Eseutil /mh utility is very helpful to carry out Exchange disaster recovery. In this recovery method, you analyze whether eseutil /p (repair utility) has successfully finished its repair process without generating any error. However, there are some situations, when you become unable to execute eseutil/mh efficiently. Due to this failure, your important data becomes unapproachable and cannot be accessed easily. To overcome such critical data loss situation or issue, you need to move for a commercial Exchange database recovery tool.

Let us discuss above topic and consider a realistic scenario. Suppose you dismount an Exchange Information database and run eseutil/mh utility to check its state. However, an error message stops you to do so that looks like:

Due to this error, you may not be able to mount your database. You will also become fail to access your important emails and other objects of the database.

Cause:

The primary reason for the occurrence of above mentioned error message is corrupt Exchange database file. An Exchange database file gets damage or corrupt due to many reasons. These reasons could be physical and logical. Virus infection, hardware issues, application error, improper shutdown of Server application, lost transaction log files etc are some prominent causes which directly impact the Exchange database (.edb) file.

Solution:

In order to fix above error and carry out Exchange Server Recovery, you can use your most recent backup file. If Backup file is not available or missing, you have to repair the corrupt database files with Eseutil /p (repair) tool. If this repair utility also does not give accurate repair results, then it is suggested to use a third party Exchange recovery tool to easily repair all the damaged database components.

Such third party programs are devised to fix corrupt database items and retrieve all data from the damaged Exchange databases. Exchange Recovery done by these tools are safe. Stellar Phoenix Exchange Server Recovery is comprehensive and easy to use software that performs safe recovery of damaged data with full accuracy. All the problems and errors related to damaged Exchange database gets fixed quickly and very easily. For the detail features of the product, you may visit here: http://exchange.stellarservertools.com/

An EDB file is Exchange database file that stores all the user data including e-mail messages, contacts, tasks and calendar items in the form of mailboxes. However, at times, these database files can get corrupted due to many reasons and in such cases, user becomes unable to access any of the mailbox items. These reasons may include logical or physical corruption.

Logical Corruption of Exchange database can occur due to database file header corruption and unexpected shutdown while Exchange server is writing data to the Exchange database file. Other reasons for corruption of Exchange database file can be physical failure of hardware failure while working with MS Exchange server. After corruption, user becomes unable to read any of the data from his mailbox and corruption of EDB files also affects smooth communication. In order to get rid of such situation, you can use Stellar Phoenix Exchange Server Recovery software that allows you to repair the corrupt Exchange database file and restore the data in a PST file format.

Stellar Phoenix Exchange Server Recovery software uses powerful scanning algorithms to perform quick and extensive scan on damaged Exchange databases. In addition, this software is available with a free trial version which can be used to test the software and evaluate its features. The free trial version of this product allows you to scan the corrupt database file and preview the repaired data. However, MS Exchange Server database becomes corrupt due to many reasons but this advance tool repairs corrupt Exchange database files regardless of the reason of corruption.

Stellar Phoenix Exchange Server Recovery is one of the highly trusted program that repairs the EDB file without damaging the original data of file. This program gives you various options like Search database file, log information of the recovered data etc. With this tool, you can easily search the corrupt .edb file in your drives, repair the database and restore the data into currently working Outlook .pst file.

Following are some of the salient features of this Exchange database recovery software:

Recovers all Exchange database objects.
‘Find EDB File’ option allows to find corrupt .edb file if you don’t know the exact location of the file.
Easily extracts data from severely damaged Exchange databases
View recovered mailboxes in 3-view format
Option to save recovered mailboxes into .pst files.
Supports recovery from MS Exchange Server 2000, 2003, 2007, and 2010 versions.

In this blog post I am going to discuss an Exchange error that appears in Exchange information store database and due to some corrupted items. Generally, this error message is displayed on the screen when an administrator tries to take backup of Exchange databases:

“Exchange Information Store backups fail with the error "0xfffffea9 - 0xa000fea9 (2684419753)"
\\SERVER NAME\Microsoft Information Store\Storage Group\Mailbox Store (Exchange Server)" is a corrupt file. This file cannot verify.

\\SERVER NAME\Microsoft Information Store\Storage Group\Public Folder Store (Exchange Server)" is a corrupt file. This file cannot verify.

\\SERVER NAME\Microsoft Information Store\Storage Group\Log Files" is a corrupt file. This file cannot verify.”

The most common reason of this error is the parallel time in which Exchange maintenance and backup process are scheduled. Or may be possible in actual Exchange database include some severe damage in its database.

Solution to Fix this Problem:

• Check and ensure that Exchange maintenance and backup process are not running in parallel. If the maintenance job is going on, stop backup process immediately. Once maintenance job completed, try to create backup of your Exchange server data.

• If NTBackup tool or other backup utility continuously fails to complete its task successfully, it might be possible that your information store database is corrupt. Try to run ESEUTIL repair tools to repair corrupt items in Exchange databases

In case the problem is not fixed by running ESEUTIL command line tool, you can sort it out by using some third party Exchange repair tool like Stellar Phoenix Exchange Server Recovery software. It is one of the most advanced, simple, and easy to use applications that can easily repair and recover all damaged as well as lost data from corrupted Exchange databases. This EDB repair software provides safe recovery of corrupted data from MS Exchange Server 2010, 2007, 2003, 2000, and 5.5 versions.

Now Exchange Server is very common in corporate world and its user's know the value of EDB file since it is responsible to store all available data. Any error or corruption may affect Exchange database that can interrupt working.

Although there are many free utilities available for recovery of the data but they become useless in the case of major corruption. There are many errors that slow down speed of work on Exchange, they are as follows:-

Deleted mailboxes

JET_errRecordNotFound, the key was not found, “Jet_errRecordDeleted”

Error in storing the Microsoft Exchange Information Store service

Sudden Shutdown Error

Exchange Server Error Code 550

JET_errInvalidDatabaseId -1010 and many more

Corrupted/Damaged header information

Exchange Server Error Code 528

All kinds of Jet Engine Errors

Unable to initialize the MS Exchange Information Store service.

The error of corrupted header and manual error

Improper Server shut downs

There are some default utilities proposed by Microsoft for the recovery of Exchange Server such as:-ESEUTIL Utility and ISINTEG Utility.

But from these tools it becomes difficult to recover data when it is severely damaged, often they delete data which may be very important to the users.

These are very common but effective errors that may affect the speed of the system. To recover from above errors there is a software named Stellar Phoenix ExchangeServer Recovery. This is very low priced and professional tool in EDB and Exchange Server Recovery. This software is highly perfect in fixing all corruption and issues that occur due to some minor bug as sudden shutdown of MS Exchange, JET engine error, device failure, malicious attack, server downtime, etc.

This efficient EDB repair utility helps to get back available data in damaged Exchange database. This software first scans corrupted files and folders with dual mode and then ask to start recovery in selective mode or full recovery. Through this software you can recover and repair essential files in no time.

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