Microsoft said today that the Exchange Web Services (EWS) API for Exchange Online and Office 365 will be retired in approximately three years. EWS is a cross-platform API that can be used to develop ...

Microsoft recently acknowledged a vulnerability affecting its email and calendar service Exchange that could allow an attacker to gain significant control over particular organizations' email servers ...

You won't be able to access email messages, meetings, and contacts from Exchange Online after October 2026. When you purchase through links on our site, we may earn an affiliate commission. Here’s how ...

UPDATE with latest: Microsoft‘s latest says its “targeted restarts are progressing slower than anticipated for the majority of affected users” after an outage due to an unspecified “recent change” ...

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, ...

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 ...

Microsoft is advising Exchange Server administrators to remove some of the endpoint antivirus exclusions that the company’s own documentation recommended in the past. The rules are no longer needed ...