KnowBe4 - Phishing Through Microsoft Office 365 Safe Links

Phishers have found a way of moving the malicious URLs in their emails past Office 365's protections. The security company Avanan says they've observed criminals using a tag in the HTML header used with the URL.

from KnowBe4 Security Awareness Training Blog https://blog.knowbe4.com/phishing-through-microsoft-office-365-safe-links