MC1462915 — Allow connections to copilot.cloud.microsoft before the Copilot URL redirect

Starting September 2026, Microsoft will redirect users from m365.cloud.microsoft to copilot.cloud.microsoft. Organizations must ensure network and security controls allow access to copilot.cloud.microsoft to avoid service disruption. Review and update firewall, proxy, and allow lists to permit *.cloud.microsoft traffic before October 2026.

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