On February 18, 2025, U.S. Customs and Border Protection issued a bulletin via its Cargo Systems Messaging Service (CSMS) announcing that the "legacy ACE [Automated Commercial Environment] Portal" will be retired.
According to the CSMS, all functionality associated with managing user accounts in the ACE Portal will be migrated to the "modernized" ACE Portal.
User management functionality will be available in the "modernized" ACE Portal beginning February 22, 2025, and the "legacy" ACE Portal will be retired on February 23, 2025.
The CSMS can be found here:
https://content.govdelivery.com/bulletins/gd/USDHSCBP-3d2e3a2?wgt_ref=USDHSCBP_WIDGET_2