Riverbed Partners with Microsoft Through the Protocol Optimization Licensing Program

Riverbed™ Technology (NASDAQ: RVBD), the technology and market leader in wide-area data services (WDS), today announced that Riverbed® has been accepted in the Microsoft Protocol Optimization Licensing Program (POLP). Through this protocol implementation agreement, Microsoft gives Riverbed access to its intellectual property and technology so that Riverbed can build on its expertise and success accelerating and optimizing Microsoft Windows-based applications over the wide-area network (WAN).

With the recent release of version 5.0 of the Riverbed Optimization System (RiOS®), Riverbed is now able to provide application-level protocol optimization for Microsoft Exchange 2000, 2003 and 2007.

Over the past four years, Riverbed has led the industry in accelerating applications over the wide-area network to enhance remote and mobile worker productivity, as well as driving IT efficiency through enabling successful IT consolidation without application performance compromise for over 4,500 customers worldwide.

"We continue to deepen our knowledge of Windows and other Microsoft applications, like SharePoint, Systems Center Configuration Manager Server, Data Protection Manager and CRM, so that our customers can offer 'wind in your hair' access and performance of Microsoft applications to its remote and mobile workers," said John Martin, VP of Product Management for Riverbed. "Working closely with Microsoft and its commitment to interoperability, we are obtaining access to application protocols to further enhance our customers' experience and IT efficiencies of Microsoft applications over the WAN. Joining the POLP program is the next step in our previously announced vision to enable customers to incorporate Windows Server-based services on the Riverbed Services Platform."

A vast majority of Riverbed customers leverage Riverbed Steelhead® appliances to accelerate Microsoft Office, Windows Server and Microsoft Exchange through optimization of underlying CIFS and MAPI protocols, as well as other Microsoft products such as Microsoft Office SharePoint Server, Microsoft -SQL Server, System Center Configuration Manager , System Center Data Protection Manager (DPM) and Microsoft Dynamics CRM.

"At Golder Associates, we have 140 engineering offices worldwide, and are running a centralized SharePoint server as our main Intranet," said Joe Potegal, senior network engineer, Golder Associates. "We were already running Microsoft SharePoint with Steelhead appliances and saw a 2.5x increase in performance for our staff collaborating on projects. With RiOS 5.0, SharePoint runs even faster. Documents that used to take 30 seconds to access without Riverbed now take 2 to 3 seconds, and our staff can collaborate from wherever they're working. We also have plans to migrate from Exchange 2003 to 2007, and the new Riverbed Exchange 2007 acceleration feature has given us the ability to do that with no concerns about performance, functionality or our consolidated architecture."

Steelhead Products
Riverbed WDS solutions enable organizations of all sizes to overcome a host of severe problems, including poor application performance and insufficient bandwidth at remote sites. By speeding the performance of applications between data centers, remote offices and mobile workers by five to 50 times and in some cases up to 100 times, Riverbed's award-winning Steelhead WDS products enable companies to consolidate IT, improve backup and replication processes to ensure data integrity, and improve staff productivity and collaboration. Steelhead products have been deployed in organizations ranging from the world's largest corporations with offices around the globe to small companies with a couple of sites that are just miles apart. To learn more, click here to view our demo.

Forward Looking Statements
This press release contains forward-looking statements, including statements relating to the expected demand for Riverbed's products and services, and statements relating to Riverbed's ability to meet the needs of distributed organizations. These forward-looking statements involve risks and uncertainties, as well as assumptions that, if they do not fully materialize or prove incorrect, could cause our results to differ materially from those expressed or implied by such forward-looking statements. The risks and uncertainties that could cause our results to differ materially from those expressed or implied by such forward-looking statements include our ability to react to trends and challenges in our business and the markets in which we operate; our ability to anticipate market needs or develop new or enhanced products to meet those needs; the adoption rate of our products; our ability to establish and maintain successful relationships with our distribution partners; our ability to compete in our industry; fluctuations in demand, sales cycles and prices for our products and services; shortages or price fluctuations in our supply chain; our ability to protect our intellectual property rights; general political, economic and market conditions and events; and other risks and uncertainties described more fully in our documents filed with or furnished to the Securities and Exchange Commission. More information about these and other risks that may impact Riverbed's business are set forth in our Form 10-Q filed with the SEC on April 29, 2008. All forward-looking statements in this press release are based on information available to us as of the date hereof, and we assume no obligation to update these forward-looking statements. Any future product, feature or related specification that may be referenced in this release are for information purposes only and are not commitments to deliver any technology or enhancement. Riverbed reserves the right to modify future product plans at any time.

About Riverbed
Riverbed Technology delivers performance for the globally connected enterprise. With Riverbed, enterprises can successfully and intelligently implement strategic initiatives such as virtualization, consolidation, cloud computing, and disaster recovery without fear of compromising performance. By giving enterprises the platform they need to understand, optimize and consolidate their IT, Riverbed helps enterprises to build a fast, fluid and dynamic IT architecture that aligns the business needs of the organization. Additional information about Riverbed (NASDAQ: RVBD) is available at www.riverbed.com.

Riverbed and any Riverbed product or service name or logo used herein are trademarks of Riverbed Technology, Inc. All other trademarks used herein belong to their respective owners.