Changes › MC1387814

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

Microsoft Teams Prevent or fix issue
Published
11 Jun 2026
Last modified
29 Jul 2026 14:32 UTC
Act by
01 Sep 2026 (3 days ago)
Ends
31 Jan 2027
First archived
25 Aug 2026
Revisions
1
Summary
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.
Tags
Updated messageUser impactAdmin impact

Full post

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.