microsoft-com.mail.protection.outlook.com has no NS records.
NS records for this zone are defined at mail.protection.outlook.com.
NS records for this zone are defined at mail.protection.outlook.com.
Question and response
Question
dig microsoft-com.mail.protection.outlook.com. NS
Answer
The response has no answer records.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0