(Updated) Microsoft Teams: Secure Reliable Transport (SRT) support for Teams meetings and events

Updated September 3, 2026: We have updated the timeline. Thank you for your patience.

[Introduction]

Microsoft Teams town halls and live events will soon support Secure Reliable Transport (SRT), a secure and resilient video streaming protocol designed to deliver high‑quality, low‑latency video over the public internet. SRT will be available alongside Real‑Time Messaging Protocol (RTMP), the existing inbound streaming protocol commonly used with external encoders. Adding SRT provides event organizers with improved reliability and flexibility, including support for backup streams with automatic failover, to help ensure smoother delivery for high‑visibility broadcast events without increasing setup complexity.

This message applies to Teams for Windows desktop and Teams for Mac desktop and is associated with Roadmap ID 554931.

[When this will happen:]

1. Targeted Release: Rollout begins in early June 2026 and is expected to complete by mid-June 2026
2. General Availability (Worldwide, GCC): Rollout begins in late June 2026 (previously mid-June) and is expected to complete by mid-September 2026 (previously end of August)

[How this affects your organization:]

Who is affected:

1. Organizations that host Microsoft Teams town halls or live events using external encoders
2. Event producers and administrators responsible for configuring broadcast streams

What will happen:

1. Organizers can use SRT as an alternative to RTMP for inbound streaming
2. Events can be configured with a primary and backup SRT stream with automatic failover
3. Existing RTMP workflows remain supported and unchanged
4. The feature is available by default; no admin policy changes are required
5. No impact to users attending events

[What you can do to prepare:].

1. Review encoder capabilities to confirm SRT support
2. Ensure you have access to port 49891 and the domain *.rtmpingest.mcr.teams.cloud.microsoft.
3. Update internal event‑production documentation to include SRT as a supported option
4. Inform event production teams that a backup stream with automatic failover is now available for Teams town halls

We’ve introduced an additional policy control for SRT-In in Teams Events. To enable users to access and use SRT-In, IT admins must explicitly allow the “SRT” setting in the AllowedStreamingMediaInput parameter within CsTeamsMeetingPolicy.

Learn more: Manage RTMP-In for Teams meetings, webinars, and town halls - Microsoft Teams | Microsoft Learn (will be updated before Targeted Release begins)

[Compliance considerations:]

No compliance considerations identified, review as appropriate for your organization.