Posted inMicrosoft Teams

MC1330891: Microsoft Teams Expands Breakout Rooms to Support Meetings with Up to 1,000 Attendees

3 minutesPosted inMicrosoft Teams
MWPRO IMPACT SCORE
OPERATIONAL IMPACT
42
0 25 50 75 100
MODERATE IMPACT • ASSESS BUSINESS IMPACT
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Primary Audience

Teams AdminsMicrosoft 365 AdminsIT ManagersService OwnersEnd Users
Why this score?
AI Confidence
HIGH
Enough detail is available to trust this assessment.
Assessment Reasoning
The announcement updates rollout dates for an expansion allowing breakout rooms in Teams meetings with up to 1,000 attendees. This is an active rollout nearing completion with Global deployment expected by the end of October 2026. Admins may need to inform organisers and adjust documentation, but no configuration is required. User impact is moderate as meeting organisers gain new capacity and flexibility without changes to existing workflows.
40
🛡️ Admin Impact
MEDIUM
45
👥 User Impact
MEDIUM
45
⚡ Urgency
MEDIUM
30
🔧 Effort
MEDIUM
ℹ️ WHAT YOU NEED TO KNOW
📌

AT A GLANCE

Teams breakout rooms now work in meetings with up to 1,000 attendees. Meeting organisers can create up to 100 rooms without reducing meeting size.
👥

END USERS

Meeting organisers can now use breakout rooms in large meetings of up to 1,000 attendees.
🛡️

IT ADMINS

Plan to inform organisers and update any training or internal guidance mentioning breakout room attendee limits.
📅

ROLLOUT TIMELINE

Rolling out:
Ends October 2026

📢 Official Microsoft Message Center Announcement

(Updated) Microsoft Teams: Breakout rooms now supported in meetings with up to 1,000 attendees
Message ID: MC1330891 (Updated)

Updated October 19, 2026: We have updated the timeline. 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 end of October 2026 (previously late September).

[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.

Source: Microsoft Message Center • Analysed by MWPro

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