(Updated) Microsoft 365 Copilot Chat: Updated commercial Copilot endpoint for Microsoft Edge

🚨 The Signal: Microsoft 365 Copilot Chat in Edge is changing its network endpoint. Organisations using network allowlists/blocklists for Copilot Chat must update configurations to maintain access and prevent service disruption.

The Impact

Security teams and network administrators are affected, with a low security risk if network configurations are not updated, potentially disrupting Copilot Chat access.

• Security Teams: Risk of service disruption if network allowlists are not updated.
• Network Administrators: Required to update firewall rules for the new Copilot endpoint.
• Microsoft 365 Copilot Chat users: May lose access if network configurations are not updated.

The Action

1. Identify all network allowlists or blocklists currently configured for Microsoft 365 Copilot Chat in Microsoft Edge.
2. Update network configurations to include the new endpoint: cr.m365copilotapp.svc.cloud.microsoft.
3. Remove the old endpoint: outlook.office.com/hosted/semanticoverview/Users from allowlists/blocklists if no longer required.
4. Test Copilot Chat functionality in Microsoft Edge after changes are applied to ensure continued access.

Domain: Other · Impact: low · Workload: M365 Apps