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IndControl Electronics, is one of the leading names in repairing and supplying industrial electronics, battery chargers, power supplies, and telecommunications systems. The company has got a fully-equipped workshop, where their experienced and trained technicians repair circuit boards and other components. Everything was working smooth, until the staff had experienced some strange Exchange behavior, due to which they were unable access the mailbox data. The problem had occurred in Outlook mailbox (currently-used emailing platform), which was used by the technical department of the company, engaged in managing sales and service support of the organization.

KDR Tools resolved the Exchange server failure issue restricting the client to access outlook mailbox.

Michael Clavien

Managing Director
Michael Clavien's

The incident of failure was accompanied with an error message, indicating the following message:

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.

However, the client had tried closing all mail-enabled applications to see if the situation could be rectified, but it failed. The Inbox repair tool was also executed to see if the pertaining issues could be fixed manually. As Outlook was running with Exchange Server, so the problem could be occurring due to accidental deletion from Exchange, Exchange crash, etc.

For a professional assistance, the client approached KDR Tools to resolve this issue at urgent precedence.


According to the scenario, one thing was quite certain that OST files was badly affected, because of this issue, the users were unable to access mailbox information. When KDR Tools team analyzed the problem, then it was discovered that the problem had originated due to the Exchange Server connection failure, which then resulted in the severe corruption of OST files.


In order to repair the encountered error, and to safely recover offline data files (OST) from the severe corruption issues, the data recovery team had suggested the client to employ only a reliable solution, as Inbox repair tool was no longer successful to troubleshoot the issue. The client was recommended to first use the free demo version of OST to PST software to repair damaged files at the convenience of operating on the host machine.

The client was able to quickly and single-handedly recover the missing as well as the permanently deleted items from the corrupt OST files using demo version. The hundreds of OST files were repaired in a single attempt and complete data (email messages, tasks, journals, sent items, notes, appointments, calendars, etc.) was displayed prior to the saving option.

Soon after the recovery using the licensed version, the staff was able to fully restore and access Outlook mailboxes, without losing a bit of information (just like nothing had happened!).


OST to PST software has successfully resolved the encountered Exchange Server failure issue (OST file corruption), without disturbing the data integrity. The client was fully-satisfied with the proposed solution that offered an effortless data recovery solution. The software has also benefited the client in directly migrating the recovered OST file items to various optional platforms like Office 365, and other email servers and web-based emailing apps, under a single hood.