Quest Software to Integrate Microsoft Windows PowerShell with Active Directory.

Interface to Allow Automation, Application Integration

BARCELONA, Spain -- Quest Software, Inc. (Nasdaq:QSFT) today announced it will be among the first ISV partners to support Microsoft Windows PowerShell, Microsoft's next-generation command-line and scripting environment. The first Quest product to support and extend Windows PowerShell will be ActiveRoles Server, Quest's solution for Active Directory-based management of the user lifecycle, including provisioning, re-provisioning and de-provisioning. Compatibility with Windows PowerShell will be the first step toward Quest's support of Microsoft Longhorn Server.

"Quest has enjoyed working closely with Microsoft over the years to continue enhancing the manageability and efficiency of the Windows Server platform," said Steve Dickson, vice president, Windows management solutions, Quest Software. "PowerShell helps IT professionals more easily control and automate system administration, so it is a natural complement to our Active Directory, Exchange and Windows management solutions."

Quest ActiveRoles Server is an enterprise class policy-based Active Directory management platform that provides:

* Automated, scriptable policy enforcement for all Active Directory administrative activities

* Flexible role-based Active Directory administration

* Ease of extending Active Directory across heterogeneous enterprises

"Windows PowerShell helps IT Professionals achieve greater productivity and more easily automate Windows system administration tasks," said Rob Bernard, General Manager, Worldwide ISV Group at Microsoft. "Quest's solution promises to add even more value to customers because of their depth of expertise in Active Directory, Exchange Server and Windows management capabilities."

About Quest Software, Inc.

Quest Software, Inc. delivers innovative products that help organizations get more performance and productivity from their applications, databases and Windows infrastructure. Through a deep expertise in IT operations and a continued focus on what works best, Quest helps thousands of customers worldwide meet higher expectations for enterprise IT. Quest's Windows Management solutions simplify, automate and secure Active Directory, Exchange and Windows, as well as integrate Unix, Linux and Java into the managed environment. Quest Software can be found in offices around the globe and at www.quest.com.

Quest and Quest Software are registered trademarks of Quest Software, Inc. The Quest Software logo and all other Quest Software product or service names and slogans are registered trademarks or trademarks of Quest Software, Inc. All other trademarks and registered trademarks are property of their respective owners.

Forward-Looking Statements 

This release may include predictions, estimates and other information that might be considered forward-looking statements, including statements concerning Quest's plans to support Microsoft Windows PowerShell and Microsoft Longhorn Server. These statements are based on current expectations and assumptions that are subject to risks and uncertainties. Actual results could differ from those anticipated as a result of various factors, including: the impact of adverse changes in general economic conditions on our relationships with customers, strategic partners and vendors; reductions or delays in information technology spending; variations in demand or the size and timing of customer orders; competitive conditions in our various product areas; rapid technological change; risks associated with the development and market acceptance of new products and product strategies; disruptions caused by acquisitions of companies and/or technologies; fluctuating currency exchange rates and risks associated with international operations; the need to attract and retain qualified employees; and other risks inherent in software businesses. For a discussion of these and other related risks, please refer to our recent SEC filings, including our Annual Report on Form 10-K for the year ended December 31, 2005. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date thereof. We undertake no obligation to update forward-looking statements to reflect events or circumstances after the date thereof.