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Database corruption in Exchange servers is an unfortunate but widespread issue. When it occurs, the data within the database is the primary casualty. The corruption typically impacts critical Exchange database files, namely Pub1.edb and Priv.edb, rendering essential emails, notes, contacts, and other vital information inaccessible to users. This unavailability triggers specific warning or error messages. In these situations, it becomes imperative to initiate the process of repairing corrupt Exchange database and restoring it to its original, functional state.

When an Exchange database encounters corruption, you may observe the following symptoms:

  • Information Store Service won’t start.
  • If it starts, you can’t stop Information Store Service and other dependent services.
  • Information Store becomes irresponsive, and CPU usage reaches 100%.
  • Users are unable to send/receive emails even if stored Information Store is restarted.

When attempting to restore the Exchange Server Database from an offline backup and executing the ISINTEG (Information Store Integrity Checker) utility, you might encounter an error message, which states:

  • Error 4294966746: JET_errDatabaseInconsistent
  • While mounting mailbox store using Exchange System Manager, an error message appears that says:
    Unable to Mount the Mailbox Store with error c104173c “The Information Store is Busy.”
  • Also, those using Exchange System Manager for the mounting database might receive an error message given below:
    An internal processing error has occurred. Try restarting the Exchange System Manager or the Microsoft Exchange Information Store service, or both.

The occurrence of these error messages can be attributed to various factors, such as virus infections, improper shutdowns, operating system failures, and more. To effectively resolve these errors, you have a couple of options: you can utilize the built-in ESEUTIL or ISINTEG tools, or you can seek assistance from a professional-grade tool.

EProfessional Exchange Recovery toolol

The ESEUTIL tool can be found in the “bin” folder of your Exchange Server. This versatile utility offers a range of switches that enable you to defragment, copy, repair, or restore your database. Its functionality is extensive, allowing you to execute a variety of tasks by employing different switches.

  • ESEUTIL /D – To defragment the database
  • ESEUTIL /R – To run a software recovery process on database
  • ESEUTIL /G – To check the database integrity
  • ESEUTIL /K – To verify checksum in the database
  • ESEUTIL /P – To repair the database
  • ESEUTIL /C – To restore the database using hard recovery
  • ESEUTIL /M – To diagnose and troubleshoot database errors
  • ESEUTIL /Y – To copy database files

ISINTEG stands as yet another powerful inbuilt tool within the Exchange server designed to meticulously scrutinize database integrity. Not only does it meticulously inspect the database for any inconsistencies, but it also adeptly rectifies any errors it uncovers. To initiate this process, ISINTEG employs a set of switches, carefully selected to meticulously check and effectively repair the database.

  • -pri – Check Private Information Store
  • -pub – Check Public Information Store
  • -fix – Repair Information Store
  • -patch – Offline backup restore patch
Professional Exchange Recovery software

A top-tier professional tool should possess the capability to effectively eliminate corruption and seamlessly restore all your data. Kernel for Exchange Server stands out as an exemplary solution, encompassing a comprehensive set of features designed to expedite Exchange Server recovery. This exceptional tool excels in effortlessly recovering both Priv.edb and Pub1.edb databases. Furthermore, it boasts a user-friendly interface that ensures ease of operation. In the following sections, we will delve into the recovery process in a succinct manner, eagerly anticipating the positive results it will yield.


This comprehensive article provides a range of methods and techniques to effectively manage various types of Exchange database corruption scenarios. You have the flexibility to choose from these methods, each designed to address specific issues. However, for those seeking a guaranteed 100% recovery with uncompromised data integrity, we highly recommend opting for the services from Kernel. The solution is not only feature-rich but also user-friendly, ensuring a seamless experience. With its robust capabilities, it can effortlessly repair corrupt EDB files of any size, making it your go-to choice for dependable database recovery.

Kernel for Exchange Server