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  • The Security Lab

Enabling Anti-Phishing Warning Banner in O365

1. Sign in to your Office 365 account using your credentials.

2. Once logged in, navigate to the Microsoft 365 admin center ( You can find it by clicking on the app launcher icon (nine dots) in the top left corner and selecting "Admin" from the available apps.

3. In the admin center, locate and click on "Security" from the left-hand menu. Alternatively, you can visit

4. Under the "Security" section, select "Threat management" and then click on "Policy" from the sub-menu.

5. Look for the "Anti-phishing" policy and click on it to open the settings.

6. In the policy section, select the "Office365 AntiPhish Default (Default)" policy

7. Enable the box next to "Show first contact safety tip (Recommended)" option.

8. Once you have selected this option, click on the "Save" or "Apply" button to save your changes.

9. Your users will now see a banner on all external emails stating" You don't often get email from Learn why this is important" where "" will be replaced by the sender of the email.

By following these steps, you will be able to enable warning banners in Office 365, which can help raise awareness and provide an additional layer of protection against suspicious emails.

There are additional custom banners that can be added via mail flow rules. We cover this in a separate article.

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