Microsoft says outdated Exchange servers cannot receive new emergency mitigation definitions because an Office Configuration Service certificate type is being deprecated.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

Forbes contributors publish independent expert analyses and insights. Davey Winder is a veteran cybersecurity writer, hacker and analyst. Thankfully, for such things, the document itself is relatively ...

The NSA, CISA, Australia's Cyber Security Centre, and Canada's Cyber Centre jointly released comprehensive security practices for Exchange hardening. Image: Envato If your team still runs Microsoft ...

Forbes contributors publish independent expert analyses and insights. Davey Winder is a veteran cybersecurity writer, hacker and analyst. Update, August 10, 2025: This story, originally published on ...

Microsoft extends ESU support for Skype for Business Server and Exchange 2016/2019, offering critical security updates through 2026.

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 approach ...

Three out of the five Five Eyes states – Australia, Canada and the US – have issued guidance to help end-user organisations secure their Microsoft Exchange Server instances, stemming in part from an ...

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 will keep delivering security updates for old versions of Exchange Server and Skype for Business Server, after admitting that some customers aren't ready to make the move to newer products.

Microsoft will block TLS 1.0 and 1.1 in Exchange Online by July 2026, requiring organizations to upgrade to TLS 1.2 or higher ...

Best practices include a focus on hardening user authentication and access, ensuring strong network encryption, and minimizing application attack surfaces. Cyber agencies from three countries ...