ooc-g2.tm-4.office.com has no MX records.
Question and response
Question
dig ooc-g2.tm-4.office.com. MX
Answer
ooc-g2.tm-4.office.com. 60 CNAME atm.outlook.mira.tm.svc.cloud.microsoft.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0