Exchange Online blocking of outdated Exchange 2016 and 2019 servers begins in September 2026, requiring the October 2025 update baseline. Related Posts: Cloudflare Raises Workers Size Limit to 64 MiB for Free and Paid Plans Google Workspace Integrates Gemini Live Features GPT-6 Astra Updates Codex Pricing The post Exchange Online to Throttle and Block Outdated Exchange 2016 and 2019 Servers appeared first on Daily CyberSecurity.