The CBP AD/Okta group "SG-EDMED-EXCHANGE-PST-BLOCK" has at least 944 members.
CN=SG-EDMED-EXCHANGE-PST-BLOCK,OU=Policies-Workstation,OU=DMG,OU=FSD,OU=Groups Security,OU=AccessControl,DC=ad,DC=cbp,DC=dhs,DC=gov
SG-EDMED-EXCHANGE-PST-BLOCK