(Updated) Microsoft Teams: Breakout rooms now supported in meetings with up to 1,000 attendees

Updated September 1, 2026: We have updated the content. Thank you for your patience. 

[Introduction]

Microsoft Teams is expanding breakout room capacity to support larger meetings. With this update, breakout rooms can be used in meetings with up to 1,000 attendees, allowing organizers to run large meetings while still enabling smaller group collaboration. This change removes the need to limit meeting size in order to use breakout rooms.

This message is associated with Microsoft 365 Roadmap ID 560320.

[When this will happen]

• Targeted Release: Rollout begins in early July 2026 and is expected to complete by late July 2026.
• General Availability (Worldwide, GCC, GCCH, and DoD): Rollout begins in mid-August 2026 (previously July) and is expected to complete by late September 2026 (previously late July).

[How this affects your organization]

Who is affected

• Meeting organizers and participants using Microsoft Teams
• Microsoft 365 tenants

What will happen

• Breakout rooms will be supported in meetings with up to 1,000 attendees.
• Organizers can create up to 100 breakout rooms per meeting.
• Organizers no longer need to limit meeting size to enable breakout rooms.
• The feature is enabled by default and respects existing Teams meeting policies.
• There is no change to the breakout room experience for meetings under the previous 300‑attendee limit.

[What you can do to prepare]

• No action is required.
• Consider informing meeting organizers and training owners about the expanded breakout room capacity.
• Update any internal guidance or training materials that reference breakout room attendee limits.

[Compliance considerations]

No compliance considerations identified. Review as appropriate for your organization.