ISOCOR Releases Next Generation Meta Directory Server; Global Directory Server v2.3 Features a Unique Combination of LDAPv3 Support, Distributed Data Access, and Performance.

SANTA MONICA, Calif--(BUSINESS WIRE)--June 12, 1998--ISOCOR (Nasdaq:ICOR), a leading Internet messaging and directory software developer, Friday announced that its Global Directory Server (GDS) v2.3, featuring support for the latest version of the Lightweight Directory Access Protocol (LDAP v3), is now shipping.

GDS and its companion products offer key benefits of open enterprise meta directory services, such as a single and consistent view of distributed data, tools for integrating different breeds of messaging and directory products, and secure and controlled access to sensitive information.

GDS is designed specifically to meet the requirements of ISOCOR's key markets: large corporations and Internet service providers. According to Dan Blum of Rapport Communications, "A typical Fortune 500 corporation that gets aggressive on directories now can realize tens to hundreds of millions of dollars in cost savings, productivity increases and strategic enabled application benefits over a five-year period. Those that sit and wait for 1999 budgets, Active Directory, a perfect LDAP or X.500 standard, or anything else that causes delays will miss out on some of these benefits."

A 1997 Dataquest study predicts that business-to-business electronic commerce will grow from approximately $2 billion in 1996 to nearly $70 billion by the year 2001. Organizations can facilitate this shift towards an electronic workplace by building a suitable information infrastructure and finding ways to share information electronically with trading partners without compromising information security. An enterprise directory allows this secure information sharing and should be considered the cornerstone of any electronic business infrastructure.

Directory deployment can dramatically reduce the total cost of ownership of many existing and future applications and services. Once data is in a directory service, it can be used by multiple applications without an increase in administration. With high-performance and secure access to directory data, the time it takes to access information and the cost of security breaches is reduced.

"This release of our GDS standards-based enterprise directory reaffirms ISOCOR's leadership role as the supplier of up-to-date technology to our customers," stated Bob Lewin, vice president of marketing for ISOCOR. "The addition of LDAP version 3 access protocol recognizes its growing importance for companies seeking a metadirectory solution."

Global Directory Server is a world class Internet directory server with support for LDAP v3 and the X.500 protocols, setting the highest standards for performance and scalability. Product benefits of GDS include: -0-

     --Reduces cost of deployment through high performance and
       scalability: delivers millisecond response times to hundreds of
       queries a second, on databases with millions of entries

     --Provides security controls for sensitive information: sensitive
       information can be secured through open standard, system-wide,
       multi-level user access controls with an intuitive management
       GUI called ISOCOR Global Directory Navigator

     --Simplifies integration and administration through intuitive
       tools and management: GDS includes extensive import/export and
       other data management tools

     --Ensures availability of mission critical information using
       robust distribution mechanism

GDS is a high-performance LDAP directory server that also complies with the X.500 1993 specification which includes support for chaining and a comprehensive replication mechanism. This facilitates deployment of a single directory service distributed across multiple servers in many different locations.

The Directory server can be accessed from any application using standard protocols including LDAP, as well as HTTP/HTML and the X.500 Directory Access Protocol (DAP). ISOCOR's GDS v2.3 is an ISOCOR Year2000 compliant product. GDS v2.3 for Windows NT is available and shipping now. Support for the Sun Solaris platform is planned for Q3 1998.

About ISOCOR

ISOCOR (www.isocor.com) develops, markets and supports high-performance software products for messaging and directory infrastructures. These infrastructures support business applications that connect dissimilar systems and enable the exchange of mission-critical business information over corporate intranets, the Internet, and public and private networks.

ISOCOR's mission is to be the leading provider of backbone software, supplying high-quality, high-performance software capable of handling an organization's messaging and directory requirements, from the simplest to the most complex.

This mission is supported by ISOCOR's award-winning products and the company's ongoing commitment to research and development, coupled with rigorous quality assurance and support.

With headquarters in California, ISOCOR is a global organization with major development centers in Santa Monica, Dublin, Ireland and Berlin. ISOCOR has sales/support offices in key international business centers including Washington, D.C., London, Paris, Berlin, and Bern, Switzerland.

Except for the historical information, the matters discussed in this news release are forward-looking statements that are subject to certain risks and uncertainties that could cause actual results to differ materially from those projected. Such factors include timely development and acceptance of new products in evolving markets, the impact of competitive announcements and products, the company's ability to increase revenues, the rate of growth of the markets in which the company competes, the specific timing of customer purchases of the company's products, the effect and rate of change in standards and platforms for messaging products, as well as the risk factors listed from time to time in the company's U.S. Securities and Exchange Commission (SEC) reports, including but not limited to the report on Form 10-K for the year ended Dec. 31, 1996 and/or Form 10-Q for the quarter ended Sept. 30, 1997, copies of which are available from ISOCOR's Investor Relations Department. The company assumes no obligation to update the forward-looking statements included in this news release.

NOTE: ISOCOR is a registered trademark of ISOCOR. All other trademarks and registered trademarks are the property of their respective holders.

CONTACT: ISOCOR, Santa Monica

Lori Mendel (Marketing Inquiries)

310/581-8100

[e-mail]

or

Miller/Shandwick Technologies

Stephanie Graves (Press Inquiries)

310/203-0550

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