Citrix Demos Product Running on Windows Vista; Global Leader in On-demand Access Deepens Integration with Microsoft Technologies in Latest Collaboration between the Companies.

LAS VEGAS -- Today at the Citrix iForum(TM) Global 2005 conference in Las Vegas, Citrix Systems, Inc., (Nasdaq:CTXS) ran a live demo of its solutions on the upcoming Microsoft Windows Vista operating system. On display at the conference was Citrix Presentation Server(TM) client running on Windows Vista. Citrix customers will be able to deploy Windows Vista as soon as it's released, taking advantage of the latest Microsoft client operating system.

Citrix's work on Microsoft Windows Vista is among the latest advances that build on the five-year technology collaboration agreement between Microsoft and Citrix signed in December 2004, and follows the July 2005 announcement by Microsoft naming Citrix its "Global ISV Partner of the Year" for the second time in the award's three year history.

"For over 12 years, mutual customers of Microsoft and Citrix have realized tremendous value in the close integration between the two companies," said David Jones, corporate vice president, business development and corporate affairs for Citrix. "Customers appreciate this tight relationship, and they'll continue to see innovative new solutions that improve upon what Citrix and Microsoft offer separately."

"Microsoft and Citrix have a long history of working together to ensure our mutual customers get the maximum amount of business and technical value," said Rob Bernard, general manager, Developer and Platform Evangelism, Microsoft Corp. "We are excited to see Citrix building on Windows Vista and we expect that to pay off for both Citrix and its customers."

Also at iForum, Citrix unveiled several other significant technologies that strengthen integration with key Microsoft products resulting from close product development work with Microsoft around Windows Server 2003 and related products. Citrix Presentation Server 4--running in both 32-bit and 64-bit environments--deepened integration with Microsoft SharePoint Portal Server 2003 and Microsoft Operations Manager (MOM) 2005. This integration improves user experience and heightens management, monitoring and security capabilities.

The new Citrix Presentation Server Web Interface for SharePoint component integrates Citrix Presentation Server with SharePoint Portal Server 2003 and Windows SharePoint Services, providing corporate workers with a single, consistent user interface for access to any content, applications and business information published by Presentation Server inside a familiar SharePoint environment. In conjunction with Windows Server 2003, Citrix Presentation Server also takes advantage of the performance monitoring capability of MOM 2005, the comprehensive event and performance management tool for Windows. With MOM 2005 and the new Management Pack for Presentation Server, also announced today, IT managers can centrally monitor a group of Presentation Server systems and server farms from a single view, and easily respond to and resolve issues from a single desktop console.

About Citrix

Citrix Systems, Inc. (Nasdaq:CTXS) is the global leader and most trusted name in on-demand access. More than 160,000 organizations around the world use the Citrix Access Platform to provide the best possible access experience to any application for any user. Citrix customers include 100% of the Fortune 100 companies and 98% of the Fortune Global 500, as well as hundreds of thousands of small businesses and individuals. Citrix has approximately 6,200 channel and alliance partners in more than 100 countries. Citrix annual revenues in 2004 were $741 million. Learn more at http://www.citrix.com.

For Citrix Investors

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