MC1387814 - Microsoft Teams: RTMP-In port and domain changes required

Updated July 17, 2026: We have paused release of this feature 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 begin rolling out in early July 2026 and expectannounce via Message center when we are ready to complete by late July 2026.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 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.