dnsc.nic.microsoft has no TXT records.
Question and response
Question
dig dnsc.nic.microsoft. TXT
Answer
The response has no answer records.
Authority
nic.microsoft. 3600 SOA dns1.nic.microsoft. hostmaster.nominet.org.uk. 1698252661 900 300 2419200 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0