Microsoft sounded the alarm on a hybrid Exchange bug in early August 2025 However almost 30,000 instances remain vulnerable Microsoft has advised users how to defend their endpoints, so patch now ...

Improper authentication bug found in Microsoft Exchange hybrid environments that could grant threat actors lateral movement across the network.

Microsoft is addressing an Exchange Online bug causing Outlook mobile users to face crashes and 12-hour email sync delays.

Microsoft is working to resolve an Exchange Online issue causing email access problems for Outlook mobile users who use ...

An Exchange Online issue is disrupting email access for mobile Outlook users with Hybrid Modern Authentication. The tech ...

The security problem affects organizations with a hybrid Exchange environment, running applications in both on-premises servers and Microsoft's cloud.

Microsoft is automatically enabling Windows Extended Protection on Exchange servers after installing this month's 2024 H1 Cumulative Update (aka CU14).

Microsoft has urged its customers to be on high alert after discovering a dangerous vulnerability in hybrid Exchange deployments.