shell:$ nslookup -timeout=2 -retry=1 'autodiscover.sales.transunion.com'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
autodiscover.sales.transunion.com	canonical name = autodiscover.outlook.com.
autodiscover.outlook.com	canonical name = autodiscover.outlook.cloud.microsoft.
autodiscover.outlook.cloud.microsoft	canonical name = acdcatm.autodiscover.mira.tm.svc.cloud.microsoft.
acdcatm.autodiscover.mira.tm.svc.cloud.microsoft	canonical name = atm.autodiscover.mira.tm.svc.cloud.microsoft.
Name:	atm.autodiscover.mira.tm.svc.cloud.microsoft
Address: 40.99.226.152
Name:	atm.autodiscover.mira.tm.svc.cloud.microsoft
Address: 52.96.215.88
Name:	atm.autodiscover.mira.tm.svc.cloud.microsoft
Address: 40.99.227.72
Name:	atm.autodiscover.mira.tm.svc.cloud.microsoft
Address: 40.99.227.88
Name:	atm.autodiscover.mira.tm.svc.cloud.microsoft
Address: 52.96.215.56
Name:	atm.autodiscover.mira.tm.svc.cloud.microsoft
Address: 40.99.226.200
Name:	atm.autodiscover.mira.tm.svc.cloud.microsoft
Address: 52.96.88.200
Name:	atm.autodiscover.mira.tm.svc.cloud.microsoft
Address: 52.96.191.152
Name:	atm.autodiscover.mira.tm.svc.cloud.microsoft
Address: 2603:1036:30a:82e::8
Name:	atm.autodiscover.mira.tm.svc.cloud.microsoft
Address: 2603:1036:30a:182b::8
Name:	atm.autodiscover.mira.tm.svc.cloud.microsoft
Address: 2603:1036:30a:1422::8
Name:	atm.autodiscover.mira.tm.svc.cloud.microsoft
Address: 2603:1036:30a:1825::8
Name:	atm.autodiscover.mira.tm.svc.cloud.microsoft
Address: 2603:1036:30a:1826::8
Name:	atm.autodiscover.mira.tm.svc.cloud.microsoft
Address: 2603:1036:30a:182a::8
Name:	atm.autodiscover.mira.tm.svc.cloud.microsoft
Address: 2603:1036:30a:1820::8
Name:	atm.autodiscover.mira.tm.svc.cloud.microsoft
Address: 2603:1036:30a:1424::8