dsiftp1.westus2.cloudapp.azure.com has no NS records.
NS records for this zone are defined at westus2.cloudapp.azure.com.
NS records for this zone are defined at westus2.cloudapp.azure.com.
Question and response
Question
dig dsiftp1.westus2.cloudapp.azure.com. NS
Answer
The response has no answer records.
Authority
westus2.cloudapp.azure.com. 60 SOA ns1-02.azure-dns.com. msnhst.microsoft.com. 1 900 300 604800 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0