Open Text s Hummingbird Connectivity Suite Certified for Windows Vista, Open Text Continues Leadership in Adopting Latest Microsoft Technologies

Exceed First PC X Server to Receive Certification; Demonstrates Commitment to Providing Enhanced Connectivity Solutions for Modern Computing Environments

Chicago, IL - 2007-05-21 - Open Text Corporation (NASDAQ: OTEX, TSX: OTC), the largest independent provider of enterprise content management (ECM) software and solutions, today announced that its Hummingbird Connectivity division has received certification for Windows Vista from Microsoft for its family of products. The announcement demonstrates Open Text s continued leadership as an early adopter of the latest Microsoft technologies.

Hummingbird Connectivity connects people to applications and data by providing a feature-rich and robust suite of technologies that helps organizations meet the challenges of integrating heterogeneous legacy infrastructures, such as UNIX® or Mainframe, with Windows desktops, while providing cost effectiveness. The company worked together with Microsoft to obtain the Certified for Windows Vista logo for Hummingbird Connectivity 2008, its next product release aimed for early summer 2007.

Microsoft is pleased that Open Text s Hummingbird Connectivity Division has earned the Certified for Windows Vista software logo for its Hummingbird Connectivity applications, said Dave Wascha, director Windows Client partner marketing at Microsoft Corp. By certifying its applications, Hummingbird Connectivity is letting its customers know that its products have met explicit standards of reliability and quality, and have been tested and proven to deliver a superior experience with a PC running Windows Vista.

Hummingbird Connectivity is an integral member of the Windows Vista Early Adopter Program. The Hummingbird Connectivity 2008 products that have received the Certified for Windows Vista logo include: Exceed®, Exceed PowerSuite , HostExplorer®, NFS Maestro Solo , NFS Maestro Client , NFS Maestro Server Enterprise Edition, Connectivity Secure Shell , and Connectivity SecureTerm®. These products were extensively tested by VeriTest, Microsoft s official certification laboratory, and have been certified on both 32-bit and 64-bit platforms.

Tens of thousands of customers worldwide utilize our products in mission-critical environments and expect us to be an early adopter of Microsoft technologies, said Eugene Cherny, General Manager of Open Text s Hummingbird Connectivity division. We are pleased to be the first PC X Server on the market to be certified for Windows Vista with the Certified for Windows Vista logo. Our products continue to be on the forefront of new technologies to ensure we provide our customers with a competitive edge of a complete and cost-effective Connectivity suite.

Open Text and Microsoft Relationship
The announcement by Hummingbird Connectivity adds to a string of recent successes for Open Text in its strategic relationship with Microsoft and its strategy of embracing the latest Microsoft technologies. In February, Open Text introduced the first U.S. Department of Defense-Certified records management solution for Microsoft Office SharePoint Server 2007; and in April, Open Text s Artesia Digital Media Group demonstrated integration with Microsoft Interactive Media Manager at the National Association of Broadcasters Conference. Open Text is a Microsoft Gold Certified Partner and the Microsoft 2006 Global ISV Partner of the Year.

For more information about Hummingbird Connectivity and its products, please visit http://connectivity.hummingbird.com.

About Hummingbird Connectivity and Open Text Corporation
Open Text is the world's largest independent provider of Enterprise Content Management software and solutions. For more information, go to www.opentext.com. The Hummingbird Connectivity division of Open Text provides a comprehensive set of core network technologies that enables the enterprise to connect to any type of legacy system. Hummingbird Connectivity seamlessly delivers enterprise mission critical data to the user desktop. Based on robust and recognized standards, every Hummingbird Connectivity product is designed to bridge the gap between legacy systems and enterprise users by delivering the quickest, easiest, and most secure single point of access to UNIX systems, Mainframes and AS/400s. For more information about Hummingbird Connectivity, visit http://connectivity.hummingbird.com.

Safe Harbor Statement Under the Private Securities Litigation Reform Act of 1995
This news release may contain forward-looking statements relating to the success of any of the Company s strategic initiatives, the Company s growth and profitability prospects, the benefits of the Company s products to be realized by customers, the Company s position in the market and future opportunities therein, the deployment of Livelink and our other products by customers, and future performance of Open Text Corporation. Forward-looking statements may also include, without limitation, any statement relating to future events, conditions or circumstances. Forward-looking statements in this release are not promises or guarantees and are subject to certain risks and uncertainties, and actual results may differ materially. The risks and uncertainties that may affect forward-looking statements include, among others, the failure to develop new products, risks involved in fluctuations in currency exchange rates, delays in purchasing decisions of customers, the completion and integration of acquisitions, the possibility of technical, logistical or planning issues in connection with deployments, the continuous commitment of the Company's customers, demand for the Company's products and other risks detailed from time to time in the Company's filings with the Securities and Exchange Commission (SEC), including the Form 10-K for the year ended June 30, 2006. You should not place undue reliance upon any such forward-looking statements, which are based on management's beliefs and opinions at the time the statements are made, and the Company does not undertake any obligations to update forward-looking statements should circumstances or management's beliefs or opinions change.

Copyright © 2007 by Open Text Corporation. LIVELINK ECM and OPEN TEXT are trademarks or registered trademarks of Open Text Corporation in the United States of America, Canada, the European Union and/or other countries. This list of trademarks is not exhaustive. Other trademarks, registered trademarks, product names, company names, brands and service names mentioned herein are property of Open Text Corporation or other respective owners.

For more information, please contact

Richard Maganini
Open Text Corporation
1-847-961-0662
rmaganin@opentext.com

Brian Edwards
McKenzie Worldwide
+1-503-577-4583
briane@mckenzieworldwide.com

Stephanie Fazio
Open Text Corporation
519-888-7111 ext.2429
sfazio@opentext.com