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Open-Xchange Server Wins “Best Open Source Solution” Award At LinuxWorld Conference & Expo in Boston

International judges reward innovative character of The leading open source collaboration server

TARRYTOWN, NY, April 6, 2006 – Open-Xchange Inc. announced today that its leading open source collaboration server, Open-Xchange, has been awarded the LinuxWorld Product Excellence Award in the “Best Open Source Solution” category.

Organized by IDG World Expo and Sys-Con Media, publisher of LinuxWorld Magazine, and selected by a jury of respected technical professionals, business professionals and journalists from the open source industry, LinuxWorld Product Excellence Awards highlights the most relevant and innovative services and products of the show in 12 separate categories.

“This award recognizes the outstanding benefits customers realize using our Smart Collaboration™ platform,” said Frank Hoberg, CEO, Open-Xchange Inc. “It’s an honor for us to see our efforts rewarded, and we share the credit with the open source community and our customers for their continued support. Open-Xchange Inc. is committed to delivering the most feature rich, cost effective, open source collaboration platform.”

Open-Xchange Server 5, provides the tools to enable Smart Collaboration™ including, email, calendaring, contacts and task management - fully integrated with advanced groupware features such as document sharing, project tracking, user forums, and a knowledge base. Open-Xchange Server 5 works with ´rich clients´ such as Microsoft Outlook as well as most browsers and mobile devices.

About LinuxWorld Conference & Expo
LinuxWorld Conference & Expo is the premier event exclusively focused on Linux and Open Source solutions. As the world’s most comprehensive marketplace for open source products and services, LinuxWorld provides business decision-makers with information and resources to implement Linux and Open Source solutions into business infrastructure and enterprise networks. For more information, visit the LinuxWorld Conference & Expo Web site at www.linuxworldexpo.com.

About Open-Xchange Server
Open-Xchange Server is one of the most active and fastest growing open source projects to date. Launched in August 2004, Open-Xchange Server now ranks #6 out of 353 groupware projects on freshmeat.net website, #1 in document repositories, #4 in handhelds, and overall #190 out of 39,978 listed projects. The Open-Xchange community website, www.open-xchange.org, is visited by 160,000 unique visitors each month, the GPL version of Open-Xchange Server is downloaded more than 9,000 times each month.

Open-Xchange Server 5 supports the two leading Enterprise Linux distributions, Red Hat and SUSE. Innovative connectors, OXtenders, enhance customer flexibility by using open standard APIs to integrate existing IT infrastructures, or even extend capabilities to mobile devices, fax servers and Samba administration tools.

About Open-Xchange Inc.
Open-Xchange Inc. delivers Smart Collaboration™ by offering reliable and scalable messaging and advanced collaboration solutions. Open-Xchange Inc. is headquartered in Tarrytown, NY, with research & development and operations concentrated in Olpe and Nuremberg, Germany. For more information, please visit www.open-xchange.com.