Microsoft has announced new Windows 365 security defaults starting in the second half of 2025 and affecting newly provisioned ...

Microsoft announced it will expand the list of blocked attachments in Outlook Web and the new Outlook for Windows starting next month.

Outlook will block .library-ms and .search-ms attachments starting July 2025 to boost security across web and Windows apps.

Security experts offer their takes on some of the flaws, including a set of vulnerabilities that could enable remote code ...

Classic Outlook users are seeing app crash when opening or creating emails, due to the June 2025 updates. Here are the steps ...

A massive password-spraying attack has compromised over 80,000 Microsoft accounts, affecting Outlook, Teams, and Office.

An email client unable to open or create emails is sub-optimal. Considering that plenty of users are likely to stick with Classic Outlook until Microsoft wrenches it from their fingers, it's a little ...

Researchers from Positive Technologies recently unveiled a new study on a keylogger-based campaign targeting organizations ...

Security researchers at Aim Security discovered "EchoLeak", the first known zero-click artificial intelligence (AI) ...

A new ATO campaign using TeamFiltration breached 80,000+ Microsoft Entra ID accounts via password spraying, impacting ...

Microsoft 365 Copilot, the AI tool built into Microsoft Office workplace applications including Word, Excel, Outlook, ...

Researchers uncover a critical AI flaw in Microsoft 365 Copilot, allowing silent data theft through email without any user ...