Summary
Table of Contents
- Update network/firewall to allow outbound ports 50118 and 50119 and the domain *.rtmpingest.mcr.teams.cloud.microsoft for RTMP-In streaming into Teams meetings, webinars, and town halls.
- Affected: admins who manage Teams meetings/webinars/town halls and event organizers using external hardware or software encoders; existing RTMP-In events will continue to function through end of 2026 but new events may fail if network changes are not made.
- Validate connectivity against Microsoft 365 endpoint guidance, test RTMP-In encoders after changes, and update internal documentation and runbooks.
- Communicate this requirement to networking, IT, and event-organizer teams so newly created RTMP-In events are not disrupted.
Primary Service: Teams
Admin Impact: High
User Impact: Low
Release Start: 01 Jul 2026
Release End: 31 Jul 2026
Services: Admin, Teams, Town Hall, Webinar
Category: Prevent or fix issues
Tags: Admin Action, User Adoption, Highlighted
History
6/11/2026 Item Added to Message Center
Microsoft Message
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.