What and why
Microsoft 365 Copilot Chat in Microsoft Edge is updating the endpoint used for the compliant Copilot Chat experience in the Edge sidebar. The endpoint is changing from outlook.office.com/hosted/semanticoverview/Users to cr.m365copilotapp.svc.cloud.microsoft.
This change aligns Microsoft 365 Copilot Chat in Edge with the current endpoint architecture and documented Microsoft Edge allowlist requirements. Organizations that manage network allowlists or blocklists may need to update their configurations to ensure continued access to Microsoft 365 Copilot Chat in Edge.
Rollout schedule
- General Availability (Worldwide, GCC, GCC High, DoD): Beginning in late September 2026 and expected to complete by late September 2026
Impact on your organization
Who is affected
- Organizations that use network allowlists or blocklists to manage access to Microsoft 365 Copilot Chat in Microsoft Edge
- Microsoft 365 Copilot Chat users accessing Copilot Chat through the Microsoft Edge sidebar
Platforms and services
- Microsoft Edge
- Microsoft 365 Copilot Chat
What will happen
- Microsoft 365 Copilot Chat in Edge will begin using the commercial Copilot endpoint
cr.m365copilotapp.svc.cloud.microsoft instead of outlook.office.com/hosted/semanticoverview/Users. - Organizations that explicitly allow or block network endpoints for Microsoft 365 Copilot Chat in Edge may need to update their configurations.
- If the new endpoint is blocked or not allowlisted, users may experience issues accessing Microsoft 365 Copilot Chat in Edge.
- No changes are expected for organizations that do not manage endpoint allowlists or blocklists for this service.
Action required and recommendations
Action required: Review and, if necessary, update your organization's network allowlists and blocklists before rollout begins.
Recommended actions:
- Review any network configurations that control access to Microsoft 365 Copilot Chat in Microsoft Edge.
- Add the following endpoint where required:
cr.m365copilotapp.svc.cloud.microsoft - Validate that users can continue to access Microsoft 365 Copilot Chat in Edge after the rollout.
Learn more
Compliance considerations
No compliance considerations identified. Review as appropriate for your organization.