Citrix Virtualization Infrastructure to Support Microsoft Windows Server 2008

Citrix XenServer and Citrix XenDesktop to Provide Interoperability
and Cross Compatibility with the Windows Platform
FORT LAUDERDALE, Fla.--(Business Wire)--Citrix Systems, Inc. (Nasdaq:CTXS), the global leader in
application delivery infrastructure, today announced details of its
expanded alliance with Microsoft Corp. to offer full support for
Microsoft Windows Server 2008 and Windows Server 2008 Hyper-V. This
will help ensure interoperability and cross compatibility with the
Windows platform for both desktop virtualization solutions with Citrix
XenDesktop(TM) as well as for server virtualization solutions with
Citrix XenServer(TM).

Today's announcement further extends the company's long-standing
support for the Windows Server platform as the foundation for its
flagship product Citrix Presentation Server(TM). Presentation Server
provides a complete system for delivering Windows-based applications
in the enterprise. The 18-year relationship between the companies, as
well as the commitment to continual innovation on the Windows platform
has vastly expanded interoperability and further extends the array of
Citrix dynamic virtualization services for Microsoft customers.

"We've built a tremendous partnership with Microsoft by helping
customers gain greater value from their investments in Microsoft
technologies. Extending our innovations to Windows Server 2008 and
Windows Server 2008 Hyper-V enables us to continue to deliver the
industry's broadest virtualization infrastructure that leverages the
Windows platform," said Mark Templeton, president and CEO, Citrix
Systems. "The datacenter is rapidly becoming the head-end for
delivering applications and desktops from a dynamic server
infrastructure. Providing expanded choice and powerful solutions for
desktop, application and server virtualization demonstrates Citrix
leadership and our shared vision with Microsoft."

Adding Value to Windows Server 2008

Citrix virtualization infrastructure products leverage a broad
array of "dynamic virtualization services" that provide core
components of an end-to-end virtual infrastructure -- from servers to
applications to desktops. These enabling technologies range from core
innovation in virtual delivery protocols to breakthroughs in
application workload streaming. Upcoming dynamic virtualization
services such as real-time virtual machine (VM) streaming, VM
interoperability, high-performance VM storage and VM high availability
will allow Citrix to further extend Windows Server 2008 Hyper-V in the
future through XenServer for server virtualization and XenDesktop for
desktop virtualization.

As part of the company's VM interoperability services, Citrix is
also developing technology to enable the portability of virtual
machines between XenServer and Windows Server 2008 Hyper-V. By
supporting both the Xen hypervisor and Windows Server 2008 Hyper-V,
Citrix will allow IT organizations to leverage heterogeneous
virtualization environments for different workloads, datacenters, or
business units within an organization.

"Microsoft and Citrix share a common vision with a focus on
developing an end-to-end computing environment that is flexible,
dynamic and responsive to business change," said Bob Muglia, senior
vice president of the Server and Tools Business at Microsoft. "By
helping to ensure interoperability of existing and new technology
platforms such as Windows Server 2008, we move beyond technical and
total cost of ownership value to delivering greater business agility
and strategic value for all of industry partners."

Citrix End-to-End Virtualization Solution

Citrix offers the industry's most comprehensive end-to-end
virtualization portfolio:

-- Virtualizing Windows-based servers with XenServer. The
XenServer product line is an enterprise-class server solution
for virtualizing servers in the datacenter as a flexible
aggregated pool of computing and storage resources. XenServer
combines comprehensive server virtualization capabilities with
unparalleled scalability, performance and ease-of-use. The
product line ranges from XenServer Express Edition, an
easy-to-use single-server solution available for free
download, to the more comprehensive XenServer Enterprise
Edition.

-- Delivering Windows-based applications with Presentation
Server. With 99 percent of the global Fortune 500 as
customers, Presentation Server is the industry's de facto
standard for delivering Windows-based applications with the
best performance, security and cost savings. Presentation
Server stores all Windows-based applications in a single
central store in the datacenter and then delivers them to end
users on demand via innovative application virtualization
technology. This technology eliminates the need to install or
manage applications on individual user devices, making
application testing, provisioning, management and support
easier and less costly. This application delivery system
automatically selects the best delivery method for the user,
the application and the location.

-- Virtualizing Windows-based desktops with XenDesktop.
XenDesktop is the industry's first complete Virtual Desktop
Infrastructure (VDI) system - moving beyond the limitations of
existing products to ensure the simple, secure and cost
effective delivery of Windows desktops to any office worker.
By integrating three key technologies required for VDI - an
enterprise-class virtual machine infrastructure, a high-speed
desktop delivery controller and on-demand desktop image
provisioning - XenDesktop will enable the delivery of virtual
desktops from the datacenter to all office workers at the
lowest total cost of ownership and the best user experience.

About Citrix

Citrix Systems, Inc. (Nasdaq:CTXS) is the global leader and the
most trusted name in application delivery infrastructure. More than
200,000 organizations worldwide rely on Citrix to deliver any
application to users anywhere with the best performance, highest
security and lowest cost. Citrix customers include 100% of the Fortune
100 companies and 99% of the Fortune Global 500, as well as hundreds
of thousands of small businesses and prosumers. Citrix has
approximately 6,200 channel and alliance partners in more than 100
countries. Annual revenue in 2006 was $1.1 billion.

For Citrix Investors

This release contains forward-looking statements which are made
pursuant to the safe harbor provisions of Section 27A of the
Securities Act of 1933 and Section 21E of the Securities Exchange Act
of 1934. The forward-looking statements in this release do not
constitute guarantees of future performance. Investors are cautioned
that statements in this press release, which are not strictly
historical statements, including, without limitation, statements by
management, statements concerning virtualization technology and Citrix
XenDesktop, and statements regarding management's plans, objectives
and strategies, constitute forward-looking statements. Those
statements involve a number of factors that could cause actual results
to differ materially, including risks associated with revenue growth
and recognition of revenue, products, their development and
distribution, product demand and pipeline, economic and competitive
factors, the Company's key strategic relationships, acquisitions and
related integration risks as well as other risks detailed in the
Company's filings with the Securities and Exchange Commission. Citrix
assumes no obligation to update any forward-looking information
contained in this press release or with respect to the announcements
described herein.

Citrix(R), Citrix Presentation Server(TM), Citrix XenDesktop(TM)
and Citrix XenServer(TM) are trademarks of Citrix Systems, Inc. and/or
one or more of its subsidiaries, and may be registered in the U.S.
Patent and Trademark Office and in other countries. All other
trademarks and registered trademarks are property of their respective
owners.

Citrix Systems, Inc., Fort Lauderdale
Karin Gilles, 408-790-8544
karin.gilles@citrix.com
or
A&R Edelman
Fryske Helms, 212-642-7739
fhelms@ar-edelman.com

Copyright Business Wire 2008