Saturday, July 14, 2007:

July 14, 2007 from 08:00 AM EST to 12:00PM EST - CDX Production including theEPA Node and the Exchange Network may experience brief intermittant outages for Network/Firewall maintenace.

Monday, July 9, 2007:

On July 9, 2007 from 05:00 PM EST to 11:00 PM EST - CDX Pre-production Environment - CDXPREPAPSRV4 (QA) Server will be upgraded from Windows 2000 to Windows 2003 Enterprise edition. Schematron and XML Validation services will be unavailable during the upgrade.

Saturday, June 9, 2007:

On June 9, 2007 05:00 AM EST to 12:00(NOON)PM EST - CDX Web and Exchange Network may be unavailable to all users due to database maintenance upgrades in the CDX Pre-production(Test)environment.

Saturday, June 2, 2007:

On June 2, 2007 from 06:00 AM EST to 06:00 PM EST - CDX Web may be unavailable to all users, including the Exchange Network due to hardware and operating system maintenance upgrades.

Saturday, May 26, 2007:

May 26, 2007 04:00 AM EST to May 27, 2007, 08:00 AM EST - CDX Web may be unavailable to all users, including the Exchange Network due to preventive maintenance of the NCC electrical systems.

Saturday, May 19, 2007:

May 19, 2007 06:00 AM EST to Midnight EST - CDX Web may be unavailable to all users due to hardware and operating system maintenance upgrades.

Saturday, May 12, 2007:

May 12, 2007 06:00 AM EST to 05:00 PM EST - CDX Web may be unavailable to all users due to hardware and operating system maintenance upgrades.

Saturday, April 21, 2007:

April 21, 2007 05:00 AM EST to 4:00 PM EST - CDX Web may be unavailable to all users due to hardware and operating system maintenance upgrades.

Friday, March 16, 2007:

March 16, 2007 09:00 PM EST to March 17, 2007, Midnight EST - CDX Web may be unavailable to all users, including the Exchange Network due to hardware and operating system maintenance upgrades.

Friday, March 9, 2007:

March 9, 2007 06:00 PM EST to March 11, 2007, Midnight EST - CDX Web may be unavailable to all users, including the Exchange Network due to hardware and operating system maintenance upgrades.

Saturday, March 3, 2007:

March 3, 2007 06:00 AM EST to March 3, 2007, 05:00 PM EST - CDX will be unavailable to all users, including the Exchange Network due to hardware and operating system maintenance upgrades.

Friday, February 23, 2007:

February 23, 2007 09:00 PM EST to February 24, 2007, 12:00 PM EST - CDX will be unavailable to all users, including the Exchange Network due to hardware and operating system maintenance upgrades.