shell:$ nslookup -timeout=2 -retry=1 'proxy-appproxy-seas-sin01p-4.msappproxy.net'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
Name:	proxy-appproxy-seas-sin01p-4.msappproxy.net
Address: 4.145.78.2