Critical Path Debuts Directory Server 4.0 for Service Providers and Enterprises.

Business Editors/High-Tech Writers

SAN FRANCISCO--(BUSINESS WIRE)--June 28, 2001

New Directory Server Provides Highest Levels of Availability,

Manageability And Performance At-Scale

Critical Path, Inc. (Nasdaq:CPTH), a global provider of Internet Messaging and Directory Infrastructure, today announced the availability of its Directory Server Version 4.0. Critical Path's Directory Server 4.0 combines the best of Critical Path's directory technology with the LiveContent DIRECTORY secured with the acquisition of PeerLogic, to deliver the mission-critical functionality that can enable enterprises and service providers to manage increasingly complex IT infrastructures and rapidly expanding customer bases. Critical Path's Directory Server 4.0 provides continuous availability and performance at scale that corporations and services providers demand, while delivering interoperability with best-of-breed directory-enabled applications.

Critical Path's Directory Server 4.0 provides corporations with a solid foundation to support their electronic commerce and communication initiatives. A primary challenge of moving businesses online is managing new, increasingly complex relationships between users and shared resources. In order to conduct business securely and effectively, it is critical that users be identified based on their individual profiles. The directory server stores authoritative user information used for this authentication. Critical Path's Directory Server 4.0 also enables role-based policy computing services and provides a consistent view of user identity information, authentication attributes, personal preferences, contact information and role association.

At the same time, service providers are seeing growth in their user bases and require a better method of managing user profile information. This activity is mission-critical not only for billing and management, but also for rapidly rolling out new services across disparate networks. Critical Path's Directory Server 4.0 is an ideal strategic repository for user identities from which service providers can provision new personalized services such as Internet messaging.

"Service providers and enterprises are realizing that directories provide the foundation for electronic commerce and communications, making them an instrumental part of Internet messaging infrastructure," said Mike Serbinis, chief technology officer for Critical Path. "Critical Path is committed to delivering the products that enable companies to overcome the complexity associated with building an Internet messaging infrastructure that can support the way business and communication is conducted today."

Introducing Critical Path's Directory Server 4.0

Critical Path's Directory Server 4.0 is a carrier-class directory that delivers the key features required in managing a distributed infrastructure: high availability, interoperability, manageability and performance at scale.

Transactional Integrity Provides High Availability For Mission Critical Data -- Businesses are moving online, striving to conduct millions of dollars of business per minute on the Internet, and the information stored and exchanged is evolving from simple data to mission-critical digital assets. Directories are used as the core infrastructure for user identity management, which grants outside parties access to the digital assets required to conduct business today. Critical Path's Directory Server inherently supports transactional integrity, which prevents data corruption problems and provides corporations and service providers with the highest levels of security and uptime.

Interoperability -- Critical Path's Directory Server 4.0 is designed for interoperability with a wide variety of directory-enabled applications, including extranet access management, Public Key Infrastructure, provisioning and meta-directory services. Critical Path's Directory Server 4.0 is standards-based from the ground up and is designed to support the existing heterogeneous network and application infrastructure customers already have in place. This interoperability is accomplished through extensive support for X.500, LDAP and Web standards such as HTTP and XML. IDS interoperates with solutions from all the major Public Key Infrastructure (PKI) vendors including Entrust, Baltimore, RSA and Verisign.

Manageability -- The server ships with unique Web-based tools that allow single point management of globally distributed directories. Critical Path's Directory Server 4.0 features a Java-based platform independent tool that makes it easy to stop and start directory servers, view and manipulate multiple directory schema, build directory content, create replication agreements, perform full and incremental directory back-up and monitor and view diagnostics across the global directory infrastructure.

Performance At Scale -- Critical Path's Directory Server 4.0 has the ability to scale to support tens of millions entries with excellent performance characteristics. Among the scalability features is advanced replication capabilities and efficient memory management. In addition to selected attribute replication, it delivers multiple sub-tree replication and selected object class filtering, introducing greater granular control over what can and cannot be replicated. This feature reduces network and disk space requirements, reduces administration overhead, further enhances performance and provides greater control over the distribution of directory information.

About Critical Path, Inc.

Critical Path Inc. (Nasdaq:CPTH) ignites the power of information for eBusiness by providing an Internet Messaging and Directory Infrastructure for the new economy. The company is a single resource that powers the flow of mission-critical information through an integrated portfolio of secure messaging, directory, data integration and collaboration solutions. Critical Path's technology strengthens the eBusiness value chain by providing an infrastructure to fuel customers' new and existing eBusiness initiatives. Critical Path is headquartered in San Francisco, with offices worldwide. More information on Critical Path can be found at http://www.cp.net

Note to Editors: Critical Path and the Critical Path logo are trademarks of Critical Path, Inc. All other trademarks are the property of their holders.

Except for historical information contained herein, the matters set forth in this press release such as statements relating to the anticipated features and benefits of the Company's Directory Server 4.0, our beliefs as to our ability and the ability of Directory Server 4.0 to successfully meet the demands of our customers, our customers' movements of their business online, the need of service providers to have better methods of managing user profile information, and the ability of our customers to use Critical Path technology to expand their services in the future are forward-looking statements within the meaning of the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995. The words "anticipate," "expect," "intend," "plan," "enable," "allow," "believe," "will," and "can" and similar expressions are intended to identify forward-looking statements. These forward-looking statements involve a number of risks and uncertainties that could cause actual results to differ materially. Factors that might cause future results to differ materially from those projected in the forward- looking statements include, but are not limited to, our evolving business strategy and the emerging and changing nature of the market for our products and services, the ability of our technology to address customer demands, our ability to release new products and services in a timely manner, the success of our products, changes in economic and market conditions, turnover of senior management and other key personnel, difficulties of integrating acquired businesses, failure to expand our sales and marketing activities unplanned system interruptions and capacity constraints, software defects, and those discussed elsewhere in this announcement. These and other risks and uncertainties are described in more detail in the Critical Path's Annual Report on Form 10-K filed on April 5, 2001 and as amended on Form 10-K/A on April 30, 2001 and Quarterly Report on Form 10-Q filed on May 15, 2001 and with subsequent filings with the Securities and Exchange Commission (www.sec.gov). These forward-looking statements speak only as of the date hereof. Critical Path, Inc. disclaims any intention or obligation to update or revise any forward-looking statements.