Open-Xchange Announces Partnership with MySQL AB

Leading Linux-based Collaboration Server to Extend Database Support

TARRYTOWN, NY, December 7, 2006 - Open-Xchange Inc., the leading provider of
open source collaboration software, announced today that it has signed a
partnership and support agreement with MySQL AB, the developer of the world's
most popular open source database. This partnership enables Open-Xchange to
embed the MySQL database into its leading open source collaboration server.

Open-Xchange will add MySQL support to its Linux based collaboration solution,
Open-Xchange Server. Both companies will work to ensure optimized interaction
between MySQL databases and Open-Xchange groupware functionality for joint
customers. Product support for MySQL will not involve any additional cost to
Open-Xchange customers. As part of the MySQL integration into Open-Xchange
Server products, upgrades will be designed to ensure smooth data migration
from existing installations.

"For companies looking for modern, low-cost collaboration solutions,
Open-Xchange is a leading open source alternative to high-priced proprietary
environments," said Marten Mickos, CEO of MySQL AB. "Open source is spreading
throughout the enterprise - now impacting collaboration software and
groupware # giving all organizations the opportunity to migrate to lower
cost, higher performance solutions."

Open-Xchange Server 5 provides critical collaborative functions such as
e-mail, calendaring, contacts and task management - fully integrated with
advanced groupware features such as Documail, Smart Linking, Smart
Permissions, document sharing, project tracking, user forums, and a knowledge
base. Open-Xchange Server 5 works with the widest variety of browsers, mobile
devices and 'rich clients' such as Microsoft Outlook.

Enterprise customers as well as service providers, such as broadband providers
and Internet service providers (ISPs) using and offering Open-Xchange
collaboration suite benefit from a full supported open source solution stack
- from the operating system to database and application.

"We are happy to offer our customers another exciting option to build their
solutions on proven and supported open source components," said Frank Hoberg,
CEO of Open-Xchange. "Supporting MySQL, we give our customers choice in how
they use Open-Xchange Server in relation to operating systems and other
applications. This helps customers to reduce overall cost of ownership for
their IT environments."

About Open-Xchange Server

Open-Xchange Server 5 delivers twice the functionality of the typical
collaboration server at half the price. It works with more browsers, PDA's
and rich clients. Unique features - such as Documail, the integration of
document sharing and email, Smart Links, Smart Permissions, and Universal
Access - make it the most productive collaboration tool on the market.
Organizations use Open-Xchange Server's GUI-based administration module
featuring Tiered Entitlement to implement role-based user management.

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

Launched in August 2004, Open-Xchange's open source project is licensed under
the General Public License for the software program and the Creative Commons,
Attribution, Noncommercial, ShareAlike or CC:by-nc-sa for the digital content
or Web Access Add-on. Open-Xchange Server is ranked #3 out of 358 groupware
projects on the freshmeat.net website, #1 in document repositories, #4 in
handhelds, and the #149 most popular overall project, out of more than 40,000
listed projects. On average, each month, the community version of
Open-Xchange Server is downloaded more than 6,000 times.

About Open-Xchange Inc.

Open-Xchange Inc. delivers Smart CollaborationT by offering reliable and
scalable messaging and advanced collaboration solutions. Open-Xchange
products provide IT departments with open source alternatives for messaging
and advanced collaboration resulting in architectural freedom. Open-Xchange's
unique technology, Smart CollaborationT, has been awarded the LinuxWorld's
Product Excellence Award, ServerWatch's Product Excellent Award, and
InfoWeek's Server Product of the Year. Open-Xchange Inc. is a privately held
company headquartered in Tarrytown, NY, with research & development and
operations in Olpe and Nuremberg, Germany. For more information, please visit
www.open-xchange.com.

###

Contact:
William Peterson, PageOne PR,, [email protected]

MySQL is a registered trademark of MySQL AB in the United States and other
countries. Other product names may be trademarks of their respective
companies.