Update 26.3.2024: While not on the same scale as 2021's Microsoft Exchange Server hack (see below this update), security problems impacting Exchange Server have reemerged. In March 2024's monthly ...

Once, reasonable people who cared about security, privacy, and reliability ran their own email servers. Today, the vast majority host their personal email in the cloud, handing off that substantial ...

Two years ago, Microsoft officials announced the next versions of on-premises Exchange Server, SharePoint Server, Skype for Business Server, and Project Server would be available in the second half of ...

Cybersecurity responders are working around the clock to shore up networks hit by last week's hack of Microsoft's Exchange email service — an attack that has impacted hundreds of thousands of ...

Get the latest federal technology news delivered to your inbox. The Cybersecurity and Infrastructure Security Agency issued an emergency directive Thursday instructing agencies to take immediate ...

Microsoft warned today in an updated security advisory that a critical vulnerability in Exchange Server was exploited as a zero-day before being fixed during this month's Patch Tuesday. Discovered ...

Microsoft says outdated Exchange servers cannot receive new emergency mitigation definitions because an Office Configuration Service certificate type is being deprecated. Emergency mitigations (also ...

A new report from the Acronis Threat Research Unit has uncovered a vulnerability in Microsoft Exchange Online settings that could enable email spoofing attacks. This issue primarily affects users with ...

Update, August 10, 2025: This story, originally published on August 7, has been updated with additional information following a demonstration of the shared service principal exploit at the Black Hat ...