Reporting Spam Originating from Onmicrosoft.com?

I just got a phishing/spam from that originates solely from the Microsoft managed networks. Google has method to report such these types of emails. I would expect Microsoft would as well.

My searches have all turned up Microsoft suggestions of adding mail filtering to my email client or using a magic button my email client doesn't have.

Is there a way to submit the headers to Microsoft so that they can manage their users appropriately?