SAN JOSE, Calif., March 25, 2004 — Emerson (NYSE: EMR), a global leader in technology and engineering solutions and services, is expanding its enterprise web conferencing to include WebEx Enterprise Edition service from web communications leader WebEx Communications (Nasdaq: WEBX). Emerson projects that it has saved more than $6 million by using WebEx for sales, training, customer support and corporate meetings.

“WebEx has become a mission-critical part of our business communications; we’ve held more than one million meeting minutes in the last six months alone,” said Tom Schunk, director of strategic relationships at Emerson. “We started using WebEx Meeting Center a few years ago and we are now expanding across the organization with WebEx Enterprise Edition. We anticipate that WebEx Enterprise Edition will continue to have a significant impact on both travel costs and employee productivity.”

WebEx Enterprise Edition is a comprehensive web communications service that combines all of WebEx’s specialized services to create a single source for an organization’s communications needs. The services included in WebEx Enterprise Edition are WebEx Meeting Center, WebEx Training Center, WebEx Support Center and WebEx Event Center.

“Emerson is a great example of how large corporations can use WebEx Enterprise Edition to save time and money while boosting sales and productivity,” said Praful Shah, vice president of strategic communications at WebEx. “With more than 8,000 corporate customers worldwide, WebEx is changing the way businesses use the Web for communications.”

WebEx manages a global network over which it delivers a range of web communications services including services for web conferencing, web-based support, remote training and online events. WebEx provides its services to corporations, technology companies and telecommunication providers worldwide. All of WebEx’s services are built on the MediaTone™ communications platform and delivered through the WebEx MediaTone Network, the only global network specifically designed for web communications. MediaTone’s unique information-switching technology allows the WebEx network to manage complex media types, deliver advanced communications functionality, and support a range devices and platforms.

About Emerson

St. Louis-based Emerson (www.gotoemerson.com) is a global leader in bringing technology and engineering together to provide innovative solutions to customers in electronics and telecommunications; process control; industrial automation; heating, ventilating and air conditioning; and appliance and tools. Sales in fiscal 2003 were $14 billion.

About WebEx Communications, Inc.

WebEx Communications, Inc. is the world's leading provider of web communications services. WebEx services are used across the enterprise in sales, support, training, marketing, engineering and product design. WebEx provides carrier-class services using its MediaTone communications platform deployed over the WebEx MediaTone Network, a high-speed global network for real-time web communications. With its unique information-switching technology, multimedia capabilities and standards-based APIs, MediaTone is the "dial tone" for Web communications. WebEx Communications is based in San Jose, California and has regional headquarters in Europe and Asia. Please call toll free (877) 509-3239 or visit www.webex.com for more information.

Journalists should contact Colin Smith at Antenna Group (415) 977-1912 or colin@antennagroup.com.

This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These forward-looking statements may be identified by use of the terms anticipates, believes, continue, could, estimates, expects, intends, may, plans, potential, predicts, should or will, or the negative of those terms or similar expressions. These forward-looking statements are subject to significant risks and uncertainties. Actual results may differ materially from those described in such statements as a result of these risks and uncertainties. In particular, these forward looking statements include, but are not limited to, the statement that WebEx online meetings help companies increase sales, decrease training cost, improve customer satisfaction and expand marketing programs. Factors which could contribute to risks and uncertainties include, but are not limited to, the failure of customers to utilize WebEx services effectively in their business or to reduce their other expenses. A fuller discussion of the risks and uncertainties that could affect WebEx Communications, Inc. are more fully set forth in WebEx Communications, Inc.’s filings with the Securities and Exchange Commission (SEC), including WebEx’s Form 10-K filed with the SEC on March 12, 2004 and Form 10-Q, filed with the SEC on November 14, 2003. WebEx Communications, Inc. assumes no obligation to update forward-looking information contained in this press release.