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Open & View Outlook OST Files (Offline Folders)

OST files, unlike PST, are the duplicate copy of user’s Exchange Mailbox which is linked to a particular Exchange mailbox and cannot be used with any other mailbox. Administrators however tend to keep the these Exchange mailbox of users at remote location but there is no way to determine which mailbox possesses the offline data in which OST files and which do not?

This can be confusing, thus wasting the administrators productivity at work. Offline Folder Report is a tool developed for the exact purpose. Administrators can now see who is using OST files easily. It is developed by Chily, the same folks behind the previously reviewed User Management app.

Administrators need to enter the name of host Exchange Server along with the logon credentials in order to generate the Offline Folder Report. Once the report is generated, it will list the users who are using OST files and those who are not using it for their mailbox communication.


It also generates the errors that occurred while searching fort OST and non-OST users. To generate a report in CSV format, navigate to OST Users, Non-OST Users, or Errors tab and hit Save.

Download Chily Offline Folder Report

Please note to run the applications as administrator in both Windows Vista and Windows 7. It also works on Windows 2000, Windows XP, Windows 2003 Server, and Windows 2008 Server. It can generate report from Outlook 2003, Outlook 2007, and Outlook 2010.


  1. Outlook OST file can be accessed only with the original Outlook profile that created it. If you have destroyed or altered the original Outlook profile you can not access OST file. In this case you need to recreate OST file. To recreate OST file, just rename the old OST file and start Outlook, it will automatically create new OST file. To access an orphan OST file you need to use third party convert ost to pst tool. One such tool for reference is available at: http://osttopstconverter.stellarservertools.com

  2. Great post, to recover a corrupt osr inaccessible convert ost topst file is the ultimate solution to get rid of the situation and recover all the data and emails it contains. I found a great resource while Googling about an related issue http://www.convert-osttopst.com

  3. http://www.osttopstconvert.com/ ost to pst convert – OST to PST Convert software is a comprehensive solution for the recovery of Exchange OST file email data, which is done by converting it into PST files that are then accessible on the client machines easily and thus helps you to recover all OST data into PST files.

  4. Above post is very useful in case when you can not open and view your OST file, but many of the times it is due to your OST file gets corrupted due to various reasons like, Exchang server migration or deletion, synchronization issues, malicious virus attacks, or hardware related issues. Once you get you ost file corrupted you should use ost to pst converter to access the mails or data stored in the OST file by converting it into PST file

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