Apex domains cannot have CNAME records.
Question and response
Question
dig leaddesk.net. NS
Answer
leaddesk.net. 5 NS ns-1228.awsdns-25.org.
leaddesk.net. 5 NS ns-303.awsdns-37.com.
leaddesk.net. 5 NS ns-920.awsdns-51.net.
leaddesk.net. 5 NS ns-1866.awsdns-41.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0