For Outlook users:
The primary way to submit reports of Spam and Phishing messages is by using the Report Message plug-in. This tool is available in Outlook via the ribbon, under the Protection section:
For Outlook on the web users:
The primary way to submit Spam and Phishing email messages is by using the Report Message add-in. For more information, see Use the Report Message add-in.
Create a new, blank email.
Address the email to the Microsoft team that reviews messages as follows:
For junk messages: address your email to email@example.com.
For phishing scam messages: address your email to firstname.lastname@example.org.
Copy and paste the junk or phishing scam message into that email (as an attachment).