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
43
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 update expands breakout room capacity to meetings with up to 1,000 attendees, which benefits large meeting scenarios. Admin oversight is minimal since the feature is enabled by default and respects existing policies, but review of internal guidance and communication to meeting organisers is advised. End users, especially organisers, will see a noticeable improvement in functionality and may need awareness training. Rollout is underway, so monitoring and updating materials is timely.
35
🛡️ Admin Impact
MEDIUM
55
👥 User Impact
HIGH
50
⚡ Urgency
HIGH
30
🔧 Effort
MEDIUM
ℹ️ WHAT YOU NEED TO KNOW
📌

AT A GLANCE

Breakout rooms in Teams meetings now support up to 1,000 attendees. This means large meetings can still use breakout discussions.
👥

END USERS

Organizers can create up to 100 breakout rooms in meetings with up to 1,000 attendees.
🛡️

IT ADMINS

Update any guidance or training about breakout room size limits and inform organisers if needed.
📅

ROLLOUT TIMELINE

Rolling out:
Late Sept 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 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.

Source: Microsoft Message Center • Analysed by MWPro

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