Apex domains cannot have CNAME records.
Question and response
Question
dig ms-acdc-admin.office.com. NS
Answer
ms-acdc-admin.office.com. 5 NS ns4-ms-acdc.office.com.
ms-acdc-admin.office.com. 5 NS ns2-ms-acdc.office.com.
ms-acdc-admin.office.com. 5 NS ns1-ms-acdc.office.com.
ms-acdc-admin.office.com. 5 NS ns3-ms-acdc.office.com.
Authority
The response has no authority records.
Additional
ns1-ms-acdc.office.com. 4 A 13.107.244.2
ns2-ms-acdc.office.com. 4 A 208.84.4.2
ns3-ms-acdc.office.com. 4 A 150.171.254.2
ns4-ms-acdc.office.com. 4 A 150.171.0.2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0