This Network Update was distributed via the Exchange Network email alerts list on May 10, 2007.

Due to server maintenance, U.S. EPA's Central Data Exchange Node, Network Authentication and Authorization Service (NAAS), and UDDI may be unavailable in the production environment from 6:00 AM to 2:00 PM on Saturday, May 12, 2007. We apologize for any inconvenience this causes Exchange Network partners.