All you have to do is simply right-click the email, then go to Junk - Report as Phishing
You can also click the drop-down menu for Junk in the Outlook Ribbon bar.
Once you "Report as Phishing" you do not need to do anything else.
If you do not have a "Report as Phishing" option, please click here.
If you believe that you fell for a phish, ie clicked a url in a suspicious email, etc. please notify the Service Desk via Live Chat immediately.