(Updated) Microsoft Teams: RTMP-In port and domain changes required
Versions captured by this deployment. Earlier versions and notices may be missing; first observed is not first published.
Microsoft asks admins to prevent or fix an issue. Read what it asks below and check the linked documentation; whether your tenant is affected is not known here.
- Microsoft's start date
- 11 Jun 2026
- Last changed by Microsoft
- 4 Sep 2026
- First seen here
- 19 Oct 2026
- Versions seen
- 1
What the notice says
Microsoft's text, with its sections, lists and tables; source markup removedUpdated September 4, 2026: We have updated the content; the release of this required change is still paused at this time. We will announce via Message center when we are ready to proceed. We apologize for any inconvenience.
What and Why
Microsoft Teams is updating the port and domain requirements for Real-Time Messaging Protocol (RTMP)-In, which enables organizers to stream content into meetings, webinars, and town halls using external hardware or software encoders. This change improves reliability and scalability for Teams streaming scenarios.
Rollout Schedule
- General Availability (Worldwide): We will announce via Message center when we are ready to proceed.
Impact on Your Organization
Who is affected
- Admins managing Microsoft Teams meetings, webinars, and town halls
- Event organizers who use RTMP-In with external encoders
Platforms/Services
- Microsoft Teams (meetings, webinars, and town halls)
What will happen
- New meetings, webinars, and town halls that use RTMP-In will require updated network access.
- Admins must allow the required ports and domain endpoints for RTMP-In streaming.
- Existing meetings, webinars, and town halls already configured with RTMP-In will continue to function through the end of 2026.
- RTMP-In continues to allow organizers to stream content into Teams from external hardware or software encoders.
- Without these updates, organizers may be unable to create or stream RTMP-In events, and newly created events may fail after December 31, 2026.
Required network endpoints
- Ports: 50118 and 50119 (RTMP/RTMPS)
- Domain: *.rtmpingest.mcr.teams.cloud.microsoft
Action Required/Recommendations
Action required by January 31, 2027.
- Review your organization’s firewall and network configuration.
- Allow outbound access to:
- Validate connectivity against official Microsoft 365 endpoint and firewall guidance.
- Communicate this change to your networking and IT teams.
- Update internal documentation if you support RTMP-In streaming scenarios.
Learn more: Manage RTMP-In for Teams meetings, webinars, and town halls | Microsoft Teams | Microsoft Learn
Compliance considerations
No compliance considerations identified. Review as appropriate for your organization.
What changed
Between the versions this installation saw, newest firstThis installation has seen one version of this notice, first on 19 Oct 2026. Later changes will show here.
Linked documentation
Microsoft pages the notice links toThe notice links to no Microsoft Learn or Support page that this installation reads.
Not confirmed here
What this page cannot tell you- Whether your tenant is affected: this is Microsoft's notice, not a check of your settings.
- Versions before 19 Oct 2026: this installation first saw the notice after Microsoft posted it.