11 Sep, 2026

Microsoft Defender flags legitimate Google search links as malicious

Microsoft is investigating an issue causing the Defender for Office 365 security software to mistakenly flag legitimate Google search links as malicious. The company first acknowledged the incident (tracked under MO1465962) at 10:30 AM UTC and says affected users are seeing “Opening this website might not be safe” warnings when trying to open the blocked hyperlinks. […]

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Microsoft Teams to let admins block external users via Defender portal

Microsoft announced that security administrators will soon be able to block external users from sending messages, calls, or meeting invitations to members of their organization via Teams. The new feature will start rolling out in early January, integrating Microsoft Teams with Defender for Office 365, and enabling admins to manage blocked external contacts through the […]

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Microsoft adds malicious link warnings to Teams private chats

Microsoft Teams will automatically alert users when they send or receive a private message containing links that are tagged as malicious. Microsoft will introduce these new warnings for messages containing URLs that have been flagged as spam, phishing, or malware, for all Microsoft Defender for Office 365 (MDO) and Microsoft Teams enterprise customers. The new link […]

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Microsoft Defender for Office 365 now blocks email bombing attacks

Microsoft says its Defender for Office 365 cloud-based email security suite will now automatically detect and block email bombing attacks. Defender for Office 365 (formerly known as Office 365 Advanced Threat Protection or Office 365 ATP) protects organizations operating in high-risk industries and dealing with sophisticated threat actors from malicious threats from email messages, links, […]

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