Quest Management Xtensions For MOM Demonstrated at MMS as Latest Support of Heterogeneity within Microsoft Systems Management; Quest Continues to Support, Add Value to Microsoft Operations Manager

Business Wire, April 25, 2006

SAN DIEGO -- At the Microsoft Management Summit 2006, Quest Software Inc. (Nasdaq:QSFT) today underscored its continuing support for Microsoft Operations Manager (MOM) 2005 by demonstrating Quest(R) Management Xtensions for MOM (formerly Vintela Systems Monitor), Quest's product that extends MOM 2005 across the heterogeneous enterprise to include Unix and Linux environments. This is the latest addition to Quest's solutions that extend Microsoft management products - including Active Directory and Systems Management Server - across heterogeneous environments. Separately, Quest announced it is expanding its MOM-related offerings to include Microsoft .NET application performance management through an agreement with AVIcode (see related release).

In addition to extending MOM to Unix and Linux and supporting MOM monitoring of .NET applications, Quest offers management packs that enhance MOM for Exchange usage analysis, event log management and system performance troubleshooting.

"Many organizations today have multi-platform environments that are complex to manage," said David Waugh, vice president of product management, Quest Software. "Together, Microsoft and Quest simplify IT by offering a broad solution that helps to manage Windows and non-Windows environments."

Pricing and Availability

North American pricing for Quest Management Xtensions for MOM begins at $539 U.S. The product is generally available now and more information can be found at http://www.quest.com/unix_linux/.> 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 more than 18,000 customers worldwide meet higher expectations for enterprise IT. 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 the availability and market acceptance of our new version of Quest Management Xtensions for MOM. 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 economic conditions on our customers, variations in the size and timing of customer orders; competitive products and pricing; rapid technological change; risks associated with the development and market acceptance of new products; disruptions caused by acquisitions of companies and/or technologies including risks relating to integration of the combined companies; risks associated with international operations; and the need to attract and retain qualified personnel. 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.