Microsoft 365 Message Center item MC1387814

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

Microsoft Teams is updating RTMP-In port and domain requirements to improve streaming reliability. Admins must allow outbound access to ports 50118, 50119, and domain *.rtmpingest.mcr.teams.cloud.microsoft by January 31, 2027. Existing RTMP-In events work until December 31, 2026. The feature release is currently paused.

Message Center ID

MC1387814

Category

prevent Or Fix Issue

Severity

normal

Services

Microsoft Teams

Tags

Updated message, User impact, Admin impact

Published

2026-06-11

Last updated

2026-07-29

Expires

2027-01-31

Action required by

2026-09-01

Updated July 27, 2026: We have updated the content; the release of this feature 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: 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.