ACE Modernized Portal Production Maintenance Window on 05/16/2022 from 9:00pm to 11:00pm EST

CSMS #51909545 - ACE Modernized Portal Production Maintenance Window on 05/16/2022 from 9:00pm to 11:00pm EST U.S. Customs and Border Protection sent this bulletin at 05/16/2022 04:22 PM EDT CSMS #51909545 - ACE Modernized Portal Production Maintenance Window on 5/16/2022 from 9:00pm to 11:00pm ET ACE Modernized Portal Production Maintenance Window on 05/16/2022 from 9:00pm to 05/16/2022 11:00pm ET. You may be unable to access the Modernized Portal during this time. If after the window you are unable to access the portal, please close your browser, clear your cache, and try again.