CISA Releases Best Security Practices Guide for Hardening Microsoft Exchange Server

In a timely response to escalating threats against email infrastructure, the Cybersecurity and Infrastructure Security Agency (CISA), alongside the National Security Agency (NSA), Australian Cyber Security Centre (ACSC), and Canadian Centre for Cyber Security, released a comprehensive guide on October 2025 outlining best practices for securing on-premises Microsoft Exchange Servers. Titled “Microsoft Exchange Server Security […]

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