Microsoft 365 Message Center item MC1387814

MC1387814 - 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.

Message Center ID

MC1387814

Category

prevent Or Fix Issue

Severity

normal

Services

Microsoft Teams

Tags

User impact, Admin impact

Published

2026-06-11

Last updated

2026-06-11

Expires

2026-08-22

Action required by

2026-07-15

[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.