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Harbinger Director Chosen to Lead Joint UN/CEFACT and Oasis Initiative on Forming Standard XML Business Specifications

ATLANTA, GA - September 21, 1999 - Harbinger Corporation (NASDAQ:HRBC), a worldwide supplier of Electronic Commerce software, services and solutions, announced today that its Director of Messaging and Technology , Klaus-Dieter Naujok, had been selected by the United Nations body for Trade Facilitation and Electronic Business (UN/CEFACT) and the Organization for the Advancement of Structured Information Standards (OASIS) to chair a working group developing the framework that will standardize eXtensible Markup Language (XML) business specifications. For more information on this initiative, go to www.unece.org/trade/untdid/sessdocs/xml.htm.

Naujok is currently the UN/CEFACT Standards Liaison Rapporteur. He has been involved in Electronic Data Interchange (EDI) and Electronic Commerce for 12 years and, in that time, he has served as chair of the Pan American EDIFACT Board (PAEB) and chair of the PAEB Technical Assessment. In addition, he is a member of the UN/CEFACT and ASC X12 Steering committees. At Harbinger, Naujok is Director of software development for the company's messaging security software product Harbinger Templar. He is also responsible for the Standards & Technology Group at Harbinger, providing the most accurate and timely information throughout the company, and out to E-Commerce professionals via the company's portal, harbinger.netSM.

"To be effective for global business, it is vital that XML specifications are based on a common framework," said Ray Walker, Chairman of the UN/CEFACT steering group. "Today, that does not exist, consequently, there are many - often competing - efforts underway worldwide to develop such specifications…. We are delighted that Klaus-Dieter Naujok will lead this group and are excited about the potential for worldwide harmonization."

"Harbinger strongly supports the UN/CEFACT initiative and is proud to have Naujok leading their efforts," said Les Wyatt, Vice President of Worldwide Product Marketing and Management for Harbinger. "XML holds strategic importance for our product development group. We are actively supporting and implementing a number of programs for XML, and driving industry leaders to together and agree on a set of principles and standards for incorporating XML technologies in Internet Electronic Commerce."

UN/CEFACT is the United Nations body whose mandate covers worldwide policy and technical development in the area of trade facilitation and electronic business. Headquartered in Geneva, it has developed and promoted many tools for the facilitation of global business processes, including UN/EDIFACT, the international EDI standard. Its current work program includes such topics as Simpl-EDI and Object-oriented EDI, and it strongly supports the development and implementation of open inter-operable, global standards and specifications for electronic business.

About Harbinger
Harbinger Corporation is a leading worldwide provider of business-to-business Electronic Commerce software, services and solutions. The company maximizes its customers' business potential with comprehensive, scalable E-Commerce solutions that help streamline operations, increase profitability and build electronic trading communities. Harbinger's objective is to serve more customers using Internet Protocols (IP) than any other provider and to establish harbinger.netSM as the preferred transaction portal for E-Commerce information and mission-critical, business-to-business E-Commerce transactions. Headquartered in Atlanta, Georgia, Harbinger provides worldwide support to its customer community from multiple International operations facilities. For more corporate information, go to www.harbinger.com. Access Harbinger's online EC Resource Center and other network services at www.harbinger.net.

This press release contains statements which may constitute "forward-looking statements" within the meaning of the Securities Act of 1933 and the Securities Exchange Act of 1934, as amended by the Private Securities Litigation Reform Act of 1995. Those statements include statements regarding the intent, belief or current expectations of Harbinger Corporation and members of its management as well as the assumptions on which such statements are based. Prospective investors are cautioned that any such forward-looking statements are not guarantees of future performance and involve risks and uncertainties, and that actual results may differ materially from those contemplated by such forward-looking statements. Important factors currently known to management that could cause actual results to differ materially from those in forward- statements include fluctuation of our operating results, the ability to compete successfully and the ability to integrate acquired companies. Additional factors are set forth in the Safe Harbor Compliance Statement for Forward-looking Statements included as Exhibit 99.1 to the Company's Annual Report on Form 10-K for the year ended December 31, 1998. The Company undertakes no obligation to update or revise forward-looking statements to reflect changed assumptions, the occurrence of unanticipated events or changes to future operating results.


Harbinger and the Harbinger logo are registered trademarks, and harbinger.net is a service mark of Harbinger Corporation or its subsidiaries. All other company and product names referenced herein are registered trademarks or trademarks of their respective owners.

Wendy Gold
Harbinger Corporation

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