List of Microsoft / Office 365 IP ranges

Copper Contributor

My organization uses the Office 365 mail scanning service, but we also use a phishing simulation service to do phishing tests on our employees. Office 365 is creating a lot of false positives, so we wish to block the Microsoft IPs on the phishing service itself, but I can't find an up-to-date list of IPs anywhere. 


I did see this article, but the IPs I needed to block were not in here:


Is there another place I should be looking?

1 Reply


According to Microsoft, we need to take care both IPs and FQDN for whitelisting or bypass handling