Concert and NaviSite Offer Managed Application Services; Managed Application Services Help Bricks and Mortar Companies Evolve to dot.coms.

Business/Technology Editors

ANDOVER, Mass.--(BUSINESS WIRE)--April 10, 2000

Concert, the AT&T and BT global venture, and NaviSite Inc. (NASDAQ:NAVI), a leading managed application service provider (ASP) and majority-owned operating company of CMGI (NASDAQ:CMGI), announced today an agreement to offer advanced application services to Concert's multinational and business customers.

The Concert/NaviSite solution offers a rapid outsourced approach enabling companies to take new ideas straight to market, and avoid the significant capital outlay and ongoing overhead associated with staffing, equipping and managing Web site operations and Internet applications.

By offering a suite of services, NaviSite and Concert are making it easier for companies to keep pace with the Internet age and diversify into new business areas, enabling them to improve service for existing customers and maximize their ability to attract new customers. Examples are a bricks and mortar bank which wishes to offer one-to-one personal Internet banking, or a major retail chain diversifying into a direct to market e-commerce sales channel.

NaviSite has the expertise and experience to offer high-end managed application services. These services enable customers to reduce time to market, cut overheads and operating costs, enhance sales growth and efficiently manage distribution. The NaviSite/Concert service will integrate exiting and new customer applications into a proactive 24 hours a day, seven days a week sophisticated management system for network, hardware, server software and associated applications. The portfolio of services are managed at a detailed level, ideal for mission-critical operations, enabling well-known brand name companies to confidently move into the Internet space and offer services to their customers.

NaviSite's expertise in managed application services will be supplemented by Concert's worldwide hosting capability. Concert manages a state of the art high speed Internet Protocol (IP) backbone network that spans 21 cities in 17 countries and will triple to 60 cities in 2001 following the integration of the IP backbone network that AT&T acquired from IBM. Earlier, Concert, together with AT&T and BT, announced a $2 billion investment in 44 Internet Data Centers in 16 countries to deliver seamless, global e-commerce services. The Centers will provide a range of co-location, Web hosting, application and networking professional services.

"Today's announcement, building on previously announced agreements with Commerce One, eFusion and Staffware, demonstrates Concert's aggressive strategy of entering into partnerships that will enable us to quickly bring value-added and innovative IP-based solutions to our global customers, " said David Dorman, CEO, Concert. "We are delighted to be working with NaviSite, a company which sets an industry standard in terms of managed application services."

"The relationship between NaviSite and Concert supports our goal of offering highly-integrated managed application solutions far beyond the scope of common co-location services," said Joel Rosen, CEO, NaviSite. "As business needs expand and Internet applications become more complex, our managed service portfolio means that customers have the freedom to diversify without losing focus of their core competencies. NaviSite looks forward to working with Concert to bring managed application services to their multinational customers."

About NaviSite

NaviSite, Inc., is a leading provider of outsourced Web hosting and application services for companies conducting mission-critical business on the Internet. The company's goal is to help customers focus on their core competencies by outsourcing the management and hosting of mission critical Web sites and applications. NaviSite is a majority-owned operating company of CMGI, Inc. with minority investment from Microsoft Corporation. For more information about NaviSite, please visit www.NaviSite.com or by phone on the East Coast call 888.298.8222, on the West Coast call 888.755.5525. NaviSite is headquartered at 400 Minuteman Road, Andover, MA 01810.

Concert

Concert, a $7 billion global venture of AT&T and BT, serves the global communications needs of multinational companies (MNCs), international carriers and Internet Service Providers worldwide with a comprehensive portfolio of voice, data and Internet services. It has a direct sales force serving the world's top MNCs. Through its network of 47 distributors, it also serves an additional 30,000 targeted customers worldwide. Concert's frame relay network serves every major city in the US and the UK and extends to an additional 170 cities in 53 countries, while its global public network directly reaches 237 countries. For more information about Concert, please go to www.concert.com.