In order to use the office 365 outlook plugin, you need to have office 365 premium.
The Phish Alert plugins for office 365 are in the form of XML files.
You first need to request these plugins by emailing us at email@example.com
Go to MS Outlook - https://outlook.live.com/owa/
Click the Gear Icon on the top right and click on manage add-ins.
Click on my add-ins and click on add a custom add-in.
Then Click add from file.
Select the report-addin.xml file and upload it.
Now under the Custom add-ins, you will see the Phish Alert Add-in.
Close the settings menu and click on an email.
The phishing icon should now be at the top right of the email you have opened.