Microsoft Teams: RTMP-In port and domain changes required

Microsoft Teams will update RTMP-In port and domain requirements by mid-July 2026 to improve streaming reliability. Admins must allow outbound access to ports 50118, 50119, and domain *.rtmpingest.mcr.teams.cloud.microsoft. Existing RTMP-In events work until end of 2026; new events need updated network settings. 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 begin rolling out in early July 2026 and expect to complete by late July 2026. 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 mid-July 2026. Required network endpoints: Ports: 50118 and 50119 (RTMP/RTMPS) Domain: *.rtmpingest.mcr.teams.cloud.microsoft Action Required/Recommendations Action required by mid-July 2026. Review your organization’s firewall and network configuration. Allow outbound access to: Ports 50118 and 50119 (RTMP/RTMPS) Domain: *.rtmpingest.mcr.teams.cloud.microsoft 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. Message ID: MC1387814

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