Should we add our own domain in the Trusted Domains in Anti-Phishing configuration?

Question

Hi,

Should we add our own domain in the Trusted Domains settings under Office 365 Anti Phishing rule?

Answer 1

Absolutely not!

You want to set that under "Domains to protect"

https://learn.microsoft.com/en-us/microsoft-365/security/office-365-security/configure-atp-anti-phishing-policies?view=o365-worldwide#use-the-security--compliance-center-to-modify-anti-phishing-policies-in-microsoft-defender-for-office-365

Add domains to protect: Configure one or both of the following settings:
Automatically include the domains I own: The default value is Off. To turn it on, slide the toggle to On.