It's time to armor up for battle with Microsoft's DMARC. In this article, Damian Scoles talks about new improvements to DMARC and how you can use them to protect against email attacks.
There are many ways in which you can improve the security of your Exchange Online environment. In this article, Sean McAvinue details the most important steps that admins can immediately implement to align Exchange Online tenants with a good security baseline and posture.
A recent increase in email spoofing false positives causing legitimate email to go to Outlook junk folders can be explained by a change in Office 365 Advanced Threat Protection.