The .ost file having offline worked data gets synchronized with the Exchange server database when connection is re-established. In fact, Offline folders are replicas of the folders found in your Exchange server mailbox. A bad thing about these OST files is that they are very sensitive to any improper system functioning. A long duration connection disruption between Exchange and Outlook place OST file in an orphaned mode. Corrupted or orphaned OST files cannot be accessed properly. As, these OST files contain essential email data so it is very significant to extract OST items as soon as possible. There is also a great risk of permanent data lose from OST files.

In order to fix OST file issues, Microsoft has given OST Integrity Check Tool (scanost.exe). It can be used to diagnose and repair OST synchronization issues. OST Integrity Check Tool (scanost.exe) scans your .ost file and your mailbox on an Exchange server, comparing items and folders in each mailbox. It attempts to reunite synchronization differences between your mailbox on the Exchange server and your local copy of the .ost file. But, it doesn’t change your mailbox on the Exchange server in any way. On completion of process, it records any differences in a scan log so that you can see what inconsistencies it found and resolved.

If you have problems in opening your .ost file, you can use the Inbox Repair tool (Scanpst.exe) to diagnose and repair errors in your .ost file. It does not interact with your mailbox on the Exchange server in any way. In many cases, when OST files get severely corrupted this utility fails to resolve your OST issues. While facing such severe conditions, you need to look for third party software. OST2PST is the best software that can recover your complete OST and convert it into Outlook PST format for easy accessibility. By using OST2PST conversion utility, you can easily convert all email messages, folders, posts, meeting requests, journals etc. in Outlook PST file format. The utility performs a complete and thorough scanning of the inaccessible OST file and then place all the emails along with their attachment. It is available with free evaluation version. It supports all the versions of Microsoft Exchange Server, MS Outlook and Outlook Express.

Summary:

If you are facing problems due to inaccessibility of Outlook OST files, don’t get anxious because OST2PST tool is an easy to use and effective utility that helps you to extract all the email items of OST files and convert them in PST file format.

• Loss of internet connectivity
• Corrupt storage media
• Crash of Exchange Server
• Accidental deletion of user mailbox from the Server

OST files enable exchange users to access their mailboxes when MS Exchange Server turns in offline mode. However, OST file corruption or non-synchronization of OST file prevents user from accessing mailbox. Adding to that when you are not able to access OST file, you may also face various error messages as mentioned below:

• Errors have been detected In the File Outlook.OST
• xxxx.OST is not an offline folder file
• Various errors when synchronizing Exchange Server mailbox with your OST file
• Cannot open particular Outlook items when offline

Data recovery with OST integrity check tool

OST integrity Checker or scanost.exe tool is in-built utility in MS Outlook that can help user to recover Exchange mailbox folders from corrupt or inaccessible OST file. Location of scanost.exe application varies from different Outlook versions. If you use Outlook 2003 and Windows XP, the scanost.exe will be located in the following folder of your computer:

• C:\Program Files\Common Files\System\MSMAPI\<locale ID>\scanost.exe

If MS Outlook 2010 is installed in your system, you’ll find scanost.exe utility in following location:

• C:\Program Files\Microsoft Office\Office14

You can start repairing of OST files with OST integrity check tool in following steps:

1. Open the default folder that stores scanost.exe application
2. Right click on scanost application icon
3. Select the Outlook profile that contains corrupt OST file
4. If a message “Connect or Work offline” appears, click Connect
5. Select appropriate option
6. Tick the “Repair Errors” check box
7. Click “Begin Scan”

OST integrity check utility compares OST data with the Exchange mailbox for discrepancies. It creates a log report of differences between the Exchange mailbox and the OST file. But, one must not forget that OST integrity check tool also has got some limitations like:

• It just fixes synchronization errors of OST file
• It is not capable to recover entire data from the inaccessible OST file
• It fails to repair OST files, that are damaged due to hardware malfunction or Exchange Server crash

Due to various limitations of scanost.exe application, it is better to convert the corrupt OST file into PST file format using third party OST2PST conversion software. You will find several OST2PST converters on internet. Kernel for OST recovery is one such smart OST file repair software that acts as ideal ost2pst converter and recover deleted exchange mailbox from the corrupt OST file in almost every condition. The software export items like contacts, journals, calendars, notes, drafts along with emails from OST file to PST. The product perform intensive scanning of the OST file and save the recovered email messages separately to a PST file at a user specified location. It fully supports OST file generated with any version of MS Exchange Server and MS Outlook.

Summary:

Exchange OST file or user mailbox may become inaccessible due to different reasons. You can start repairing inaccessible Outlook profile on Exchange Server using scanost.exe tool of MS Outlook. However, scanost.exe is not capable of fixing OST file corruption issues due to hardware failure or crash of server. In such a scenario, you should choose a professional OST2PST conversion tool to recover mailbox items.

As soon as MS Outlook finds internet connectivity, it checks the Exchange and send or receives the emails. Every user mailbox is attached to the MS Exchange Server as well. Sometimes, the mailbox is deleted accidently and user fails to access OST files or the Offline folder.

It happened with me when I switched on my computer today and was not able to open the mailbox or access OST files that I had saved on my local hard disk. There could be umpteen reasons to corrupt the OST files. May be it was some virus attack, malicious web content download or I could have accidently deleted some useful information.

As usual, there was important information in my mailbox and failure to recover these were a threat to my job. The only solution to resolve this was to convert OST into PST file format and retrieve the information as much as possible. I tried ScanPST.exe and other similar inbuilt tools provided by Microsoft and failed miserably. Being a novice computer user it was not easy to repair entire OST file.

However, I discovered the easy to use, proficient email recovery software that flawlessly repairs entire OST file without trouble! OST2PST Conversion software competently repairs corrupt or damaged OST files and performs comprehensive recovery. Emails along with the related properties, folders, calendar entries, contacts, notes, journals etc are recovered.

I was unsure about the software and to my surprise; I could actually take a trial before purchasing. The software can be downloaded free of cost. It repairs the corrupt OST files and displays them in hierarchical manner to be previewed. I checked if my corrupt files can be repaired from the software and once I was sure, I purchased OST2PST Conversion software from the safe and secure official website.
The OST2PST Conversion software performs OST recovery for encrypted files as well as password-protected files and for all the objects. This utility is compatible with Outlook 98, 2000, 2002, 2003, 2007 and 2010. Providing the interactive user interface, the software supports Microsoft Exchange Server 5, 5.5, 2000 and 2003.

Blog Summary:

The worst fear of anyone using MS Outlook is to lose crucial data. Many inbuilt utilities help users to recover corrupt OST files and convert them to readable PST format as and when required. However, it requires certain technical skills and excellence to repair corrupt OST files manually. Hence, OST2PST conversion software is used. It is the third party solution to entire OST corruption woes!

Talking about OST file error message, following is one such error message that you could get encountered with while making an attempt to access Exchange OST file:

“Errors have been detected In the File Outlook.ost”

Now, facing such an error message can’t be taken easily. In fact, the moment you face any such error message you also lose access to emails, attachments, appointments, calendar entries, notes, tasks and journals. The appearance of this error obviously indicates that the Exchange OST file has become corrupt. And, it doesn’t matter any attempts you make to access the file, you would keep on receiving the same error message again and again resulting in loss of essential data stored in it.

Certainly, these OST files are quite significant in MS Exchange environment and its loss could prove very fatal. So, immediate action needs to be taken and ideal option that you could opt is taking help of external OST 2 PST conversion software.

There are many who presume that it’s almost impossible to restore OST files. Well, whatever be the reason for OST file corruption that makes its inaccessible. It does not mean the files can’t be restored. After all, these OST files are very much available on the local computer that very well contains the mail messages along with the other items of your Exchange mail account. With the proper usage of OST 2 PST conversion utility, you can effectively restore the user data from the damaged OST files by using advanced mechanisms.

OST 2 PST converter like Kernel for OST to PST conversion software is very a proficient application that facilitates you to restore all the damaged email from OST files in just a few minutes. The tool automatically creates a profile in MS Outlook to save your emails. Using this application, you won’t have to import the Personal storage table to outlook. Key feature of the product is it allows you save email items just by selecting a date from a date range. Moreover, the application is also available in trial version and so you could also evaluate its efficiency at free of cost.

Blog Summary

These OST files provide you with excellent work flexibility to work without actually getting connected to Exchange Server. However, there are situations when it also gets corrupt. To deal with such unwanted conditions the most appropriate option that you could opt is taking help of a third party OST file recovery tool that has got excellent ability to perform OST 2 PST conversion.

Hardware reasons: OST files are usually stored in the user’s hard drive. Any issue with hard disk may leave OST files corrupted.

• Data storage device failure: If the hard disk that stores the OST file, has got bad sectors or crashed then you may only read some part of the OST files or the data you are reading is full of errors.

• Network connection error: When the OST files are synchronized with the server through a network connection, if network cards, cable or any hard ware or wires get disconnected or damaged, synchronization process would be aborted suddenly and the OST file may get corrupt.

• Power failure: If at the time of accessing or synchronizing the OST files, you face power failure then OST files may get severely damaged.

Software Reasons:

• Virus attacks: there are certain viruses that damage the OST files exclusively or make them inaccessible. Always install some good antivirus utility to ward off your computer from such deadly viruses.

• Abnormal Outlook termination: Usually, people quit Outlook properly by saving entire work and clicking on exit. However, when it is shut down abnormally, OST files may get corrupt.

• Synchronization error: When OST files and Exchange server is not synchronized properly, uses may lose data and OST files get corrupt.

• Deficiencies in Outlook programs: For example, in Outlook 97-2002 the data limit is 2GB. That is, if the size of OST file increases more than 2GB, it gets corrupt automatically.

When you try to open a corrupt OST file, it gives following errors:

• “Cannot open your default email folders. The file xxxx.ost is not an offline folder file.”

• “Unable to expand the folder. The set of folders could not be opened. Errors could have been detected in the file xxxx.ost. Quit all mail-enabled applications, and then use the Inbox Repair Tool.”

• Encounter a large numbers of conflict items

• Cannot open particular Outlook items when offline

• Various errors when synchronizing Exchange Server mailbox with your OST file

Microsoft has come up with inbuilt tools like OST check and Integrity tool that helps in repairing OST files. The best way to recover entire items is to convert OST2PST files. However, performing manual recovery requires in depth technical knowledge and lots of time. Usage of third party Kernel for OST to PST software is preferred. Easy to use, interactive and user-friendly, this software performs complete OST2PST file recovery within minutes. OST2PST software is also available in free trial edition, so that users can try and learn about the utility’s features before buying!

A user can lose the OST files due to various events like server downtime, hard disk failure, accidental user account deletion, database corruption, software attack or software malfunction. In such conditions, the OST files behave very abnormally and become inaccessible. There are various organizations performing a hard-core data transaction which is a vital part of their daily business and they cannot afford a delayed communication because of corrupt OST file. Only a quick converter tool like OST to PST can give back your lost data stored in the orphaned offline storage table files. With this OST to PST converter tool, a non technical user can also recuperate the lost or corrupt data. This utility keeps the data intact and correct while exchanging the files from OST to accessible PST files.

OST to PST conversion tool is an award winning tool whose OST recovery rate is unique to any other recovery tool. By using the OST to PST converter tool, you can easily recover all the email messages, folders, calendars, contacts, journals and notes from MS Outlook. The bulky documents, attachments, images and formats can also be recovered accurately with this tool. Thanks to its advanced algorithms that are equipped with this tool and make it to convert every OST files. Besides OST files, you can use EML and MSG formats also and convert them into PST formats.

In addition, this tool provides an option for recovering mails in Plain Text, RTF and HTML files. The developers of this tool have assured that it encompasses all the needs of the end customer in order to recover OST files. OST to PST tool is advanced software tool which fixes all technical errors in just few times.  After completing of scanning process, the email messages, with folders, posts, appointments, contacts, tasks, distribution lists, task requests, journals, meeting requests and notes searched in the OST file are displayed in a tree like structure, from where you can efficiently ensure the recovered email messages and save them separately to a PST file at the desired location. It automatically makes a new profile in MS Outlook to save your email messages, so you do not require importing the PST file to Outlook. The OST to PST tool supports MS Exchange 5.0, 5.5, 2000, 2003, 2007 and 2010.

As OST files work as mirror image of Exchange Server user accounts, therefore; when the server is down, users send and receive emails through OST files. In addition, emails can also be composed and update can be made in mailbox items through the Outlook OST files. OST to PST conversion is necessary when OST files become orphaned due to permanent connection failure between the server and the MS Outlook email client. OST files are called orphaned because in absence of synchronization with MS Exchange Server their data becomes inaccessible. To retrieve user mailbox data from such orphaned OST files, Outlook OST2PST software is required.

By converting OST files to PST, MS Outlook email client can be used to easily access and read the updated mailbox information from any local system. Kernel for OST to PST conversion tool is the wonderful tool for this purpose which and gives far better outputs than Microsoft’s in-built utility Scanost.exe. Kernel for OST to PST successfully converts all the emails, email attachments, address book entries, contact details, calendar entries, personal folders, appointment schedules and other items from OST files to PST files. You can convert emails from Plain Text; HTML or RTF formats successfully by this Outlook OST2PST tool. One of the best features of this software is that it makes no alterations in the metadata, properties or internal structure of the OST files contents during conversion. Thus, you can tell that this Outlook OST2PST conversion utility is the best that can be efficiently utilized by users facing OST file problems.

Conversion of OST2OST helps in retrieving emails, tasks, notes, contacts, journals, calendars, etc those are present in the corrupt or orphaned OST files. The process of OST to PST conversion can be performed manually by copying the data from OST files to a newly created PST folder. However, this is possible only when the OST file is accessible, not corrupt and MS Outlook email client is synchronized with MS Exchange Server. Otherwise, trustworthy OST2PST conversion utility can be helpful for users in recovering their important emails from the damaged OST files. Kernel for OST to PST conversion is built on advanced technology for effectively converting the .ost files to .pst format. This tool performs a widespread scan of the corrupt OST file to retrieve every bit of data from inaccessible emails and their attachments along with other items.

OST file may not synchronize with the mailbox on the Exchange Server such that the all emails and other data items become inaccessible and generates the error message “Synchronization Failed”. The reasons for occurrence of such an error message may be that the OST file is not configured to synchronize, improper settings of the profile for the Exchange Server, network connection unavailability and corrupt OST file. To resolve such an error message, OST file must be properly configured to synchronize, ensure proper profile settings for Exchange Server and check the availability of network connection.

Using a third-party OST to PST file converter, user can easily convert OST files to PST file format that can be easily accessed with MS Outlook Email client. The tool extracts and restores all emails and other items alongwith attachments, contacts, calendar, journals, notes, tasks, etc. existing in deleted, corrupt, unusable, or damaged OST files. The tool supports OST files created with any version of MS Outlook and Exchange Server. The software provides options for saving the recovered OST files in PST, DBX, MSG or EML format and converts password-protected OST files.

OST to PST conversion software offers easy-to-use, self-descriptive, user-friendly user interface and is available as a free demo version for evaluating its features, functionalities, and capabilities.

AppName: Outlook.exe
AppVer: 14.0.4760.1000
ModName: Kernelbase.dll
ModVer: 6.1.7600.16385
Offset: 0003194b

For resolving this problem a user can refer the Inbox Repair Tool or Scanpst.exe utility. This is a Microsoft based free utility which repairs the minor OST & PST file errors. It resides at C:\Program Files\Microsoft Office\Office14.

Note: If the problem still persists then the user would have to refer a specifically designed like OST 2 PST convertor.

For running the Inbox Repair Tool close the MS Outlook email client first. Browse & search the tool at C:\Program Files\Microsoft Office\Office14. Then open the tool by double clicking it. Now select Browse in the Microsoft Outlook Inbox Repair Tool dialog box. Find & select the Outlook data file (.pst or .ost), for opening it.

For Windows 7 and Windows Vista the default location for Outlook data files would be:

C:\Users\username\My Documents\Outlook Files for PST files.
C:\Users\username\My Documents\Outlook Files for OST files.

Note: For viewing the path of the .ost file ensure that the hidden files and folders are visible:

Go to the Start menu and click Computer. Click organize and select the Folder and search options. Activate the Show hidden files, folders, and drives option from the View Tab. Now click OK.

The Outlook data files default location in Outlook 2010 for Windows XP client would be:
C:\Documents and Settings\username\My Documents\Outlook Files for PST files.
C:\Documents and Settings\username\Local Settings\Application Data\Microsoft\Outlook for OST files.

Note: To see this path for the .ost file, please ensure hidden files and folder are visible.

Go to the Microsoft Outlook Inbox Repair Tool dialog box, click Start. After the scan review the information in Microsoft Outlook Inbox Repair Tool dialog box. Click repair and finish the task with OK.

If the OST files have not recovered then it is the time to use OST to PST Conversion tool. By converting the damaged files from OST 2 PST converter this tool provides access to them.

Talking in terms of OST file corruption, there are various situations where OST Email Data Loss is ascertained:

In situation where your original MS Exchange profile gets deleted or modified just after the creation of a new mailbox, the probability of losing OST file data loss increases drastically.

Other situation could be when you alter your MS Exchange profile and form a new mailbox. In such circumstances all your OST files email data will get lost permanently.

Apart from this, OST files also get unusable due to Exchange user account deletion, Exchange Server crash, database corruption, Microsoft Exchange Server downtime, virus infection, etc. Now, after facing any of the above mentioned scenario, the most important action that you need to take is opt an appropriate approach that could allow you re-access the data present in OST file. If you think that it is nearly impossible to restore or access the data from OST file, then you must note that OST file is very much available on the local computer featuring all the mail messages along with other items of your Exchange mail account.

In every such situation, it is very important for you to take an immediate action from your side so that you can get back your significant email data. And, the most effective approach that you must follow is usage of a third party OST to PST converter. Using an OST to PST file converter, you can convert OST to PST format for Outlook to access your OST data in PST files. The tool can help you in retrieving all emails & other items existing in unusable OST file. Perhaps, you can take help of a result oriented tool like convert OST to PST free software that can extract emails from damaged outlook files without wasting any time. The utility performs an intensive scanning of the OST file and locates all the emails along with their attachment. And, once the scanning process gets over, software shows the recovered emails and other email items.