ReadonlyactionReadonlyaddressID of the address to be extended.
ReadonlynameName of the Custom Field.
Optional ReadonlyvalueIf value is absent or null, this field will be removed if it exists.
Trying to remove a field that does not exist will fail with an InvalidOperation error.
If value is provided, it is set for the field defined by name.
Adding a Custom Field to an Address of a Business Unit generates the BusinessUnitAddressCustomFieldAdded Message, removing one generates the BusinessUnitAddressCustomFieldRemoved Message, and updating an existing one generates the BusinessUnitAddressCustomFieldChanged Message.