macOS / binaries /

AddressBookSourceSync

/System/Library/Frameworks/AddressBook.framework/Versions/A/Helpers/AddressBookSourceSync.app/Contents/MacOS/AddressBookSourceSync
Syncs Contacts data with servers

AddressBookSourceSync syncs Contacts data with iCloud, CardDAV, and Exchange servers.

The binary is a part of AddressBookSourceSync application.

source: man