cloud.smtpjuniper.com has no NS records.
NS records for this zone are defined at smtpjuniper.com.
NS records for this zone are defined at smtpjuniper.com.
Question and response
Question
dig cloud.smtpjuniper.com. NS
Answer
The response has no answer records.
Authority
smtpjuniper.com. 300 SOA ns1-09.azure-dns.com. dns-admin.ejuniper.com. 1 3600 300 2419200 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0