azmail.neogrid.com has no NS records.
NS records for this zone are defined at neogrid.com.
NS records for this zone are defined at neogrid.com.
Question and response
Question
dig azmailneogridprd.eastus2.cloudapp.azure.com. NS
Answer
The response has no answer records.
Authority
eastus2.cloudapp.azure.com. 60 SOA ns1-06.azure-dns.com. msnhst.microsoft.com. 10001 900 300 604800 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0