Update your firewall rules: Teams and Copilot are changing address
Microsoft is redirecting Microsoft 365 and Teams web users to new *.cloud.microsoft domains, requiring firewall and proxy rule updates by early October.
Starting September 2026, Microsoft is redirecting M365 web users to copilot.cloud.microsoft and Teams web users to teams.cloud.microsoft, announced via MessageCenter posts MC1465764 and MC1462915. All redirects should complete by early October 2026, with limited Teams exceptions possible until December 31, 2026. Microsoft advises reviewing client, proxy, firewall, and secure web gateway configurations, and suggests using TenantRestrictions to control personal Microsoft account access instead of blocking the new Copilot address.
- Microsoft redirects M365 web users to copilot.cloud.microsoft and Teams to teams.cloud.microsoft by early October 2026
- Changes announced in MessageCenter posts MC1465764 and MC1462915
- Firewalls, proxies, and secure web gateways must be updated for the new addresses
- TenantRestrictions control recommended instead of blocking the new Copilot address
- Teams redirect exceptions allowed only until December 31, 2026
From the original article
1 min read at csoonline.com
Microsoft is changing the destination address of two of its most popular services: starting this month, it will redirect M365 and Teams web users to copilot. cloud. microsoft and teams.
csoonline.com
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