Other companies like Google, Oracle, Cloudflare, Adobe, et merda, do dumb shit all the time, but they do those things because they're evil and intentionally want to cause problems. Microsoft is just plain dumb.
A good example is that the Outlook (the email service) has existed since 2012, yet it's never not broken. Since some time around March 18th of this year, they decided to say fuck it to the idea of having server names match the connecting IPs.
For example, BL0PR03CU003.outbound.protection.outlook.com resolves to 2a01:111:f403:c101::7, but the server that claims to be "BL0PR03CU003" (HELO / EHLO name) connects using 2a01:111:f403:c101::1.
Those aren't the same, Microsoft!
How TF does someone get this in front of someone at Microsoft / Outlook without going nuts?