ALISO VIEJO, Calif., Dec. 13, 2007 – Quest Software, Inc.  (Nasdaq: QSFT) today announced that Forrester, Research, Inc. named it a leader in the December 2007 Forrester Wave™: Active Directory Management Solutions, Q4 2007. Quest received the highest scores for current offering, strategy and market presence. According to the report, “Quest provides the most complete set of capabilities across its product suite…Quest continues to grow its leadership position.”

In addition, the report stated, “Quest offers solutions that are both individually competitive and comprehensive in scope. Quest offers the best Active Directory recovery facilities, and its Vintela products help customers extend Active Directory functionality to non-Windows systems. Quest also recently purchased another significant player in this space, ScriptLogic, in order to better target SMB environments.”

“Quest’s leadership in the Active Directory market and the Windows Management space underscores our dedication to customers and our strong partnership with Microsoft,” said Steve Dickson, vice president and general manager, Windows management solutions, Quest Software. “We continue to make investments in the latest and greatest areas of Active Directory including support for Windows PowerShell and Windows Server 2008.”

Quest’s Active Directory tools include support for migration, administration, availability monitoring, restoration, reporting and auditing, Group Policy management and extensions to non-Windows platforms. To learn more and to download a complimentary copy of the report please visit: http://info.quest.com/QuestSoftwareHomePageLinkADForresterResearch.

About Quest Software, Inc.

Quest Software, Inc., Microsoft’s 2007 Global Independent Software Vendor Partner of the Year, 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 50,000 customers worldwide meet higher expectations for enterprise IT. Quest’s Windows Management solutions simplify, automate and secure Active Directory, Exchange Server, SharePoint, SQL Server, .NET and Windows Server as well as integrating Unix, Linux and Java into the managed environment.