Microsoft is working to resolve a known issue that causes an anti-spam service to mistakenly block Exchange Online and ...

Microsoft’s September 2025 Exchange Server Hotfix Updates fix hybrid app issues, with support for SE, 2019, and 2016 versions ...

A critical vulnerability in Microsoft Exchange Server remains unpatched on nearly 30,000 systems worldwide, raising concerns about potential exploitation in hybrid cloud environments.

Microsoft Exchange customers have been warned about a new high-severity vulnerability, which could allow an attacker to escalate privileges within an organization’s connected cloud environment. The ...

Microsoft warns of CVE-2025-53786 in Exchange Server risking cloud identity abuse; admins urged to patch.

Microsoft on Wednesday informed organizations about a high-severity vulnerability affecting hybrid deployments of Exchange Server. According to Microsoft, the vulnerability, tracked as CVE-2025-53786, ...

Microsoft and the Cybersecurity and Infrastructure Security Agency issued a “high-severity vulnerability” alert on Wednesday evening about a flaw affecting on-premises versions of Microsoft ...

In ongoing hacks, Microsoft says it has identified two Chinese hacking groups taking advantage of a key software flaw.

Microsoft this week announced it will be bringing its Extended Security Update (ESU) program for on-premises Exchange Server 2016 and 2019, offering organizations critical protection as they ...

Cybersecurity firm QiAnXin links a North America-based APT group to long-term espionage targeting China’s AI, semiconductor, and military industries through a zero-day Exchange exploit.

For Exchange Server SE, Microsoft explained, in addition to purchasing the required Server licenses and CALs, customers must also maintain an active subscription.