hybrid microsoft 365

The hybrid Microsoft 365 tag covers discussions about integrating on-premises infrastructure with Microsoft 365 cloud services, particularly in mixed environments where components like Postfix email relays interact with Exchange Online. Topics include patching vulnerabilities such as CVE-2026-43964 in Postfix, which can disrupt SMTP communication between Linux relays and Microsoft 365, Exchange, and line-of-business applications. The tag emphasizes operational challenges in hybrid estates, where maintaining secure and reliable mail flow requires coordination across Windows, Linux, and cloud systems. It is relevant for IT professionals managing hybrid Microsoft 365 deployments who need to address security updates, compatibility issues, and best practices for hybrid email configurations.