SEATTLE, WA - July 16, 2001 - Primus (Nasdaq: PKSI) and Onyx® Software (Nasdaq: ONXS) have created a robust knowledge-enabled CRM platform for Ericsson Microsoft Mobile Venture that links the company’s entire enterprise, providing employees, partners and customers with anytime, anywhere access to critical sales and support information. The enterprise-wide software implementation delivers measurable efficiencies to Mobile Venture’s overall operations, including service, support and resolution processes.

Mobile Venture uses the integrated Primus and Onyx solution to provide quality service and support options for customers of Moso, the company’s complete solution for easy mobile access to Microsoft Outlook functionality and secure mobile access to Internet and corporate intranets. Customers or partners accessing Mobile Venture’s sales and support Web site use a single, seamless interface - customized with the Mobile Venture brand - to access both the Primus and Onyx applications. "In a knowledge-centered organization such as ours and with the company’s commitment to offering anytime, anywhere access to personal and business information, it is essential that the two applications integrate as seamlessly as possible," said Ulf Avrin, President, Ericsson Microsoft Mobile Venture.

The unique integration of the Primus web-based software and the Onyx thin-client portal suite offers enterprise-wide, knowledge sharing efficiencies. The Onyx and Primus software implementation leverages the strength and scalability of technology that brings together critical data from many areas of the organization. "Anyone who has been through the process of trying to create a knowledge-centric enterprise environment will appreciate the ease of use we’re experiencing with this specific integration model," said Avrin.

"Onyx and Primus have great synergy," said David Ridout, Vice President of Primus Business Development. "Together, we can deliver a quantifiable ROI to our joint customers by significantly increasing organizational efficiencies through Web-based and traditional service. We’re looking forward to helping more clients secure the financial and customer satisfaction rewards that come from managing customer relationships and knowledge resources more efficiently."

"Global enterprises must deliver a seamless, branded customer experience to build customer loyalty and neutralize competitive threats, and integration is the key to achieving this goal," said Scott Bledsoe, vice president, business development, Onyx Software. "The seamless Onyx-Primus integration we’ve enabled for Mobile Venture clearly demonstrates the flexibility of Onyx’s XML-based and 100 percent Internet-native architecture to deliver real business value for customers."

Onyx and Primus are currently working with SAFECO, Firstlogic and Captura on integrated CRM and sales/support knowledge management installations, and Primus currently uses Onyx technology to enable its own CRM processes. Primus is one of Onyx’s key knowledge application software partners.

About Ericsson Microsoft Mobile Venture
Ericsson Microsoft Mobile Venture is driving the mobile Internet by developing, integrating and marketing mobile e-mail solutions to network operators and service providers. Moso is the advanced mobile e-mail solution that gives easy mobile access to Microsoft® Outlook functionality and secure mobile access to Internet and corporate Intranets. The Mobile Venture enables carriers to launch services rapidly with unique capabilities to support multiple device types, bulk service activation for large enterprises and security solutions. Customers include NetCom, Vodafone and Hong Kong CSL and the Moso solution have so far been commercially launched in Norway and New Zealand. Read more at www.mobileventure.com.

About Onyx Software
Onyx Software Corp. (NASDAQ: ONXS) is a global supplier of customer relationship management (CRM) enterprise applications that power a company's entire business world, connecting sales, marketing and service organizations with customers, prospects and partners. Through an innovative mix of Internet technology, strategic services and customer commitment, Onyx helps companies create the seamless, branded customer experiences they need to forge competitive advantage and build real business value. Its reliable, scalable, flexible, holistic solutions enable companies to attract, acquire and retain customers and partners across all channels and touch points. Onyx customers include American Express, Broadwing, Commerce One, Credit Suisse, Dreyfus, FirstWorld Communications, Portland Trail Blazers, Prudential Investments and Sierra Health Services. Get more information at 888-ASK-ONYX, info@onyx.com.

About Primus
Primus provides knowledge application software that enables companies and their customers to access the information they need, easily and on demand. Primus® software delivers the ability to capture and share knowledge to optimize employee productivity, improve the customer service experience, and enable a rapid return on investment (ROI). Primus has more than 180 customers worldwide, including such industry leaders as 3Com, 3M, The Boeing Company, Compaq Computer Corp., Ericsson, Inc., Fujitsu Limited, Inc., Genuity, Motorola and Novell. Based in Seattle, Primus has offices throughout the United States, and in Europe and Japan. For more information, visit www.primus.com or call 206-834-8100.

Primus, Primus eServer, and Primus eSupport, Primus Interchange are registered trademarks or service marks of Primus Knowledge Solutions, Inc. Other products and company names mentioned in this press release may be the trademarks of their respective owners.

Any statements, expectations and assumptions contained in this press release that do not describe historical facts, such as statements about the implementation, use and performance of Primus products and the anticipated results constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. There is no guarantee that these results will actually occur or that this new product will provide future revenues. Any forward-looking statements contained in this release are based on current expectations, are not guarantees of future performance, and are subject to a number of risks and uncertainties. Factors that could cause actual results to differ materially from current expectations include the following: difficulties encountered in the integration, deployment, or implementation of the Primus products and customer’s systems; failure in a customer’s widespread adoption and use of the Primus products; quality of the customer’s database of solutions; fluctuations in customer demand; use of the Web as a delivery vehicle for customer support solutions; risk resulting from new product introductions and customer acceptance of new products; rapid technological change; the risks associated with competition and the rapid consolidation of competitors; continued growth in the use of the Internet; the ability of Primus to manage its growth and integration efforts and the ability of Primus to compete successfully in the future, as well as other risks identified in Primus' Securities and Exchange Commission filings, including but not limited to those appearing under the caption "Factors Affecting our Future Operating Results" in the Primus' Report on 10-K filed on March 26, 2001. The extent of return on investment of Primus products is specific to our customer’s experience.

Onyx is a registered trademark of Onyx Software Corporation in the United States and other countries.

Contact:

Shawn Yujuico VisiTech Public Relations Telephone: 817.267.9686 Fax: 810.885.5291

Kate Ord Primus Public Relations Manager Telephone: 206.834.8438

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MEDIA CONTACTS

Americas / Corporate Headquarters Mitch Briggs Public Relations Coordinator Consona Corporation Telephone: 317.249.1620 Mobile: 317.829.4210 Europe, Middle East, Africa Richard Furby Managing Director, Onyx UK Telephone: +44 (0) 1344 322 199 Fax: +44 (0) 1344 489 035 Japan Daisuke Sawamura Director, Professional Services Telephone: +81 03 5215 7311