Microsoft 365, Exchange Online, Security & Compliance, Guides & How-To, Compliance & Governance, Microsoft 365 Security, Mail Flow Tiago Carvalho Microsoft 365, Exchange Online, Security & Compliance, Guides & How-To, Compliance & Governance, Microsoft 365 Security, Mail Flow Tiago Carvalho

Exchange Online Mail Flow Architecture 2026: HVE, SMTP AUTH retirement, and the modern connector playbook 

2026 Exchange Online playbook: HVE GA, SMTP AUTH Basic Auth retirement timeline, DMARC enforcement, connector architecture, transport rules and Defender for Office 365 baseline.
Read More