MC1478949 - Breakout Rooms for Microsoft Teams Webinars now support up to 1,000 participants and 100 rooms

Microsoft 365 Message Center announcement MC1478949.

MS Message Center's Summary

Microsoft Teams webinars now support breakout rooms for up to one thousand participants across one hundred rooms. This rollout is available now and allows for large scale interactive sessions like training workshops. Administrators should inform webinar organisers about the new limits and update any internal guidance accordingly while no direct administrative action is required to enable the feature.

Administrator impact
No direct administrator action is required.
End user impact
Organisers can now run breakout rooms with up to one thousand participants and one hundred rooms during webinars.
Importance
3/10: This is a feature enhancement that expands existing functionality without requiring administrative configuration or introducing risk.

Microsoft Summary

Breakout Rooms in Microsoft Teams webinars now support up to 1,000 participants and 100 rooms, enabling large-scale interactive sessions like training and workshops. No admin action is needed; organizers should be informed and guidance updated accordingly. No compliance issues identified. Available now.

Message Center ID
MC1478949
Category
stay Informed
Severity
normal
Services
Microsoft Teams
Tags
New feature, User impact
Published
2026-09-24
Last updated
2026-09-24
Expires
2026-11-17

[What and Why:] Breakout rooms are now officially supported in Microsoft Teams webinars with up to 1,000 participants across up to 100 breakout rooms, enabling organizers to divide larger webinar audiences into smaller groups for focused discussions and collaborative activities. [Rollout Schedule:] Available now. [Impact on Your Organization:] Organizations can now confidently use breakout rooms in larger Microsoft Teams webinars to create more interactive and engaging experiences. With support for up to 1,000 participants and 100 breakout rooms, organizers can facilitate small-group discussions and activities at scale, making the capability well suited for scenarios such as large-scale training, onboarding, workshops, and collaborative learning. [Action Required/Recommendations:] No admin action is required. Inform Teams webinar organizers that breakout rooms now support larger webinars with up to 1,000 participants and up to 100 breakout rooms. Update internal webinar, training, or event guidance if it describes breakout room limits. Consider using breakout rooms for large training, onboarding, workshop, and collaborative learning scenarios. [Compliance considerations:] No compliance considerations identified. Review as appropriate for your organization.