CSMS #50360511 - CBP is aware that the ACE system is experiencing issues due to network connection issues. U.S. Customs and Border Protection sent this bulletin at 12/11/2021 01:16 PM EST Cargo Systems Messaging Service CSMS #50360511 - CBP is aware that the ACE system is experiencing issues due to network connection issues. CBP is aware that the ACE system is experiencing issues due to network connection issues. Will send another CSMS message when the network issue is resolved.