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.