Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
This is almost unbelievable! Microsoft preaches itself that DKIM, SPF and DMARC are standard nowadays. In fact, you make extensive use of it yourself.
I do not understand that Microsoft does not support this as standard.
In addition, according to me, your reaction is not quite right. I have heard from DMARC Analyzer (https://www.dmarcanalyzer.com/) that they receive reports from Microsoft from some customers! How can that be explained. In addition, I understand that many other customers received reports until Oct-Nov last year. At the time, there have been quite a few changes at Microsoft regarding your mail infrastructure.