A security researcher has issued a warning to all 400 million users of Microsoft Outlook after discovering an email bug that could allow anyone to impersonate official Microsoft accounts.

The zero-click hole, which was patched by Microsoft Tuesday, could point to far more vulnerabilities in the form-based architecture of Outlook. Among the large batch of security patches that ...

Microsoft is pushing its new Outlook app onto Windows 10 whether ... release and the February 11, 2025, security update. Once installed, the new Outlook app will replace the existing Mail and ...

Tom Burt, corporate vice president of Customer Security & Trust at Microsoft, called the near-term outlook "pessimistic." "Because these actors conduct both targeted and opportunistic attacks ...

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

Starting in July, two new file types will be blocked in Microsoft Outlook. The .library-ms and .search-ms extensions both ...