Microsoft 365 administrators can use built-in Defender for Office 365 tools to enable impersonation and domain protection, reducing phishing risks by identifying spoofed senders and untrusted domains.

Microsoft 365 administrators can fine-tune Defender's anti-phishing policies to determine how detected spoofed or impersonated messages are handled, from quarantine and deletion to user safety tips ...

A credential phishing campaign that likely relied on AI-generated code to evade detection has been stopped by Microsoft Threat Intelligence. The attack, which targeted organizations in the US, ...

Microsoft says an Exchange Online issue that mistakenly quarantined legitimate emails last week was triggered by faulty heuristic detection rules designed to block credential phishing campaigns.

Microsoft confirms Exchange Online and Teams messages were mistakenly quarantined due to a phishing detection bug (EX1227432).

The rollout by IT@JH Enterprise Messaging will begin on Feb. 16 and will continue over the following two months until all users are fully updated ...

Since 5 February, Microsoft Exchange Online has been silently swallowing legitimate business emails. Most people affected still don't know it. The problem, tracked as service incident EX1227432, began ...

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