362 votesin the plans · 15 comments · Office 365 Security & Compliance » Auditing · Flag idea as inappropriate… · Admin →
512 votes24 comments · Office 365 Security & Compliance » Spam & Phishing · Flag idea as inappropriate… · Admin →
ATP does not consider mails from other Office 365 tenants, or even mailboxes inside of your tenant, as safe. The best way to put a stop to this is to follow the recommendations in SecureScore for your tenant; and report phishing mails to us promptly.Chris Hager commented
This is HUGE. The problem worsens the more people migrate to O365. We've performed a number of these migrations but are considering switching to G Suite because this has gotten so problematic for our clients.