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 ...

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 ...

In the Cached Exchange Mode, a copy of your mailbox is saved on your computer. The copy offers prompt access to your data and is often updated with the server that runs Microsoft Exchange. Cached mode ...

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 ...

CISA has issued an emergency directive ordering all Federal Civilian Executive Branch (FCEB) agencies to mitigate a critical Microsoft Exchange hybrid vulnerability tracked as CVE-2025-53786 by Monday ...

Parts of the federal enterprise are likely susceptible to the flaw that allows hackers to hijack on-premises versions of Active Directory. CISA plans to release an emergency directive on Thursday, ...