How to mark the emails with sensitive words as spam in Exchange admin center?

Step 1: Sign into Office 365 admin portal via https://portal.office.com

Step 2: Click on Admin from the left pane and navigate to Exchange admin center.

Step 3: Switch to Protection tab and click on spam filter.

Step 4: Double-click on the Default policy.

Step 5: Scroll down to Apply sensitive word list and select On.

Step 6: Click Save.