enterpriseenrollment.iristransport.com has no NS records.
NS records for this zone are defined at iristransport.com.
NS records for this zone are defined at iristransport.com.
Question and response
Question
dig pexsucpeu02.westeurope.cloudapp.azure.com. NS
Answer
The response has no answer records.
Authority
westeurope.cloudapp.azure.com. 60 SOA ns1-201.azure-dns.com. msnhst.microsoft.com. 10001 900 300 604800 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0