How to reporting junk and phishing emails on outlook and outlook for web
Outlook (new) and Web Access
1. In the new Outlook or Webmail, select and right click on the email that you want to report as Junk or Phishing.
2. Choose Report and select report junk or phishing

Outlook (classic) on Windows
1. In outlook, select the email that you want to report as Junk or Phishing.
2. In the right side of the ribbon, click 'Report Massage' drop down selection

3. In the drop down list select as 'Junk' or 'Phishing'

Note : The email will automatically be sent to Microsoft to improve the the spam filters going forward.