OCEANPORT, NJ — October 3, 2005 — CommVault®, a provider of Unified Data Management™ solutions, today announced that it will offer integrated support for Microsoft System Center Data Protection Manager (DPM) 2006, within the CommVault® QiNetix™ Unified Data Management suite. This builds upon CommVault's extensive support of the Microsoft Windows platform and existing integration with various Microsoft applications. CommVault QiNetix offers Windows customers the ability to incorporate DPM solutions into their broader enterprise data protection strategy. CommVault embraces the DPM environment by:

• Adding extensive application support for Microsoft Exchange, SQL Server, SharePoint and Active Directory data.
• Protecting the Microsoft DPM server itself, enabling the backup and restore of DPM itself to any media device.
• Enhancing the recovery capabilities of Microsoft DPM collected files protected by CommVault to any PC in the network, without the need to restore via the Microsoft DPM server. This solution extends the traditional disk-to-disk-to-tape scenario by offering freedom to recover the data regardless of media type and where it originated.

The integration of CommVault software with DPM is a natural extension of CommVault's heritage in working with the Microsoft Windows platform and Volume Shadow Copy Service (VSS); one that encompasses years of VSS framework and Microsoft Windows applications integration support experience.

"Microsoft is pleased to continue working with CommVault to deliver a broader choice of low-cost storage solutions," said Ben Matheson, Group Product Manager at Microsoft Corp. "The combination of CommVault QiNetix Unified Data Management suite and Microsoft System Center Data Protection Manager offers a simplified and improved data management experience leveraging disk-based backup and recovery. This integrated approach is enabled by CommVault's wealth of experience working with Windows applications."

"CommVault welcomes DPM to the market place and we look forward to enhancing the DPM environment with our rich application support, archiving and content management solutions," said Randy De Meno, Director of Advanced Applications and Microsoft Partnership. "We envision Microsoft System Center Data Protection Manager as a way to enhance our Unified Data Management solution and provide customers with the utmost protection and management at the lowest possible cost."

About CommVault
CommVault® provides Unified Data Management™ solutions for high-performance data protection, universal availability and simplified management of data on complex storage networks. The CommVault® QiNetix™ platform, based on CommVault's Common Technology Engine, integrates Galaxy backup and recovery, point-in-time replication, hierarchical storage management, archiving for compliance, service level management and storage resource management software solutions. The QiNetix unified approach allows customers to add/integrate QiNetix components, at a fraction of the time, effort and money required by separate point products.

Information about CommVault is available on the World Wide Web at www.commvault.com or by calling (732) 870-4000. CommVault's corporate headquarters is located in Oceanport, New Jersey in the United States.

©2005 CommVault Systems, Inc. CommVault Systems, CommVault Galaxy, CommVault QiNetix, DataMigrator, DataArchiver, QNet, CommServe StorageManager, MediaAgent, iDataAgent, CommCell and the CommVault logo are trademarks and may be registered trademarks in some jurisdictions of CommVault Systems, Inc. Product and company names herein may be trademarks of their respective owners.