Burlington, MA, May 10, 2004 ­ XOsoft, a leading provider of continuous application availability software solutions, today announced that its WANSync^HA Exchange solution achieved a Clear Choice rating by Network World in a comparative review of disaster recovery products for Microsoft Exchange servers. Having withstood rigorous testing and evaluation, WANSync^HA received the highest overall score of 4.65 out of a possible 5. It was designated the Clear Choice among leading products on the market for backup and recovery of Exchange servers.

According to Network World, "Of the four products tested, only WANSync^HA Exchange prevented any outgoing messages from being lost at the time of failure. The product earned our Clear Choice honors for its ability to fail over quickly without dropping pending messages." The review’s summary added, "...it's very clear that the features of an Exchange-specific product, XOSoft's WANSync^HA Exchange, make a big difference in how effective it can be in getting Exchange servers back up and running after a disastrous situation."

"Network World’s Clear Choice product review program is recognized as one of the most thorough and comprehensive testing programs in the industry," said Leonid Shtilman, Founder and CEO of XOsoft. "We are pleased that WANSync^HA received the overall highest rating among the products tested. With the most advanced replication technology, unmatched availability and embedded Rewind™ technology, WANSync^HA Exchange has proven it is the best product of its kind."

Tailored specifically for Microsoft Exchange, WANSync^HA Exchange is designed to boost the availability of Exchange servers with automatic failover to local or remote replicas in real time. The product’s application-aware design proved a standout capability during testing. According to Network World: "WANSync^HA Exchange earns our Clear Choice designation because it adapted quickly to our setup, presented clear Exchange installation-specific options, and required no subsequent intervention to complete the processes of failover detection, failover and bringing our hotsite/back-up site online."

The review pointed out additional technical strengths: "WANSync^HA Exchange can redirect DNS to point to the failover Exchange server, then change it back if necessary at a failback point. Also, it can change the IP addresses so that the remaining live Exchange server can be found if DNS can't (or shouldn't) be changed."

WANSync^HA’s automatic failover capability ensures that, should primary Exchange servers fail or be inoperable for any period of time, operations will be transferred automatically and seamlessly to replicas with no IT administrator intervention required. In addition, soft installation avoids inconvenient system shutdowns or reboots, so that users need not be taken offline at any stage. XOsoft markets a set of similar solutions tailored specifically for Microsoft SQL and Oracle Database servers, as well as WANSync Server, which provides high availability and recovery capabilities for any type of file or application server.

The scope of the areas covered during product testing included replication, synchronization and recovery functions. In addition, each product was evaluated on failover performance, time to availability, installation/configuration, management, documentation and support.

For the complete product review, please visit http://www.nwfusion.com/reviews/2004/0503rev.html. Also be sure to attend a live presentation held every Wednesday on XOsoft’s product offering (registra-tion may be carried out on the company’s Web site at http://www.xosoft.com/webcasts/index.htm).

About Network World's Clear Choice designation
The Network World Clear Choice honor is bestowed upon the highest scoring product in a comparative review when that product scores 3.7 or higher out of a possible 5 points. Additionally, a product featured in a single-product review is given a Clear Choice designation if it achieves a minimum of a 4.5 score as determined by Network World testers.

Network World is the premier source of objective, authoritative testing-based articles in the network marketplace. Network World produces articles featuring both single-product and comparative product tests on a weekly basis. The publication partners with its 14-member Network World Lab Alliance, a group of the most qualified industry experts, network integrators and universities, to set methodology, conduct testing and produce articles. Test results are published each week in Network World, and on Network World Fusion at http://www.nwfusion.com/reviews/.

About XOsoft
Founded in 1999, XOsoft is the leading provider of continuous application availability software solutions. XOsoft’s business continuity, disaster recovery and continuous backup products ensure uninterrupted access to applications and provide instantaneous recovery from any type of disaster.

XOsoft’s WANSync provides unrivaled disaster recovery through real-time replication, while the state-of-the-art WANSync^HA adds the highest availability through automatic failover. Both business continuity software platforms allow enterprises to cope with planned as well as unplanned downtime, and maintain peerless information infrastructure availability. The company’s Data Rewinder continuous backup solution offers added protection and allows system administrators to effectively "undo" application and database corruptions by quickly and easily rewinding data resources to their latest consistent state.

About Network World, Inc.
Network World, Inc., the leader in Network Knowledge, empowers network IT executives through education, information and community. Network World, an IDG company, is the leading provider of news, analysis, events and education on information technology. Network World publishes the leading newsweekly, Network World, hosts the most active online community, Network World Fusion (www.nwfusion.com) and produces educational seminars and events worldwide. Network World’s portfolio of strategic marketing programs provides marketing and agency professionals with the tools to generate high-quality leads, optimize marketing campaigns, and create new revenue opportunities.

Network World and Network World Fusion are trademarks of International Data Group (IDG).