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Zoom: Set Up and Work with Pre-assigned Breakout Rooms

Up to 200 participants can be pre-assigned to breakout rooms in advance by hosts with standard Zoom licenses. Follow the guidelines below when pre-assigning breakout rooms for your meetings.

This article applies to: Zoom

In This Article

Breakout rooms allow meeting hosts to split up meeting participants into as many as 100 separate sessions. The meeting host can choose to split the participants of the meeting into these separate sessions automatically or manually, or they can allow participants to select and enter breakout sessions as they please. (The host can switch between sessions at any time.)

Considerations While Scheduling Meetings

Turning on the Breakout Rooms option

Before scheduling a meeting in which you want to pre-assign attendees to breakout rooms, enable breakout rooms. To do this:

  1. Go to your account settings.
  2. In the section In Meeting (Advanced), activate the Breakout room feature (the slider on the right).
  3. Check the box for Allow host to assign participants to breakout rooms when scheduling.

Set Up Breakout Rooms Through the Cornell Zoom Website—Not Canvas

For meetings you have created through Canvas, to set up breakout rooms and pre-assignments, edit it using the Cornell Zoom website.

Turning on Breakout Room Pre-assignment When Scheduling a Meeting

With the Breakout room option enabled, hosts and co-hosts can pre-assign breakout rooms when scheduling a meeting. To do this:

  1. Under Meeting options, check the box Breakout room pre-assign. 
  2. Use either the Create Rooms link to manually assign invited participants, or use Import from CSV file to upload breakout room assignments in CSV format.

Use a CSV File to Pre-Assign Your Attendees to Breakout Rooms

It's recommended that hosts (or co-hosts) of meetings with large numbers of attendees use a CSV file to assign breakout rooms. Use Zoom’s sample CSV file as a guide.

Pre-Assigned Breakout Rooms Have a Participant Limit

Be aware that pre-assigned breakout rooms are limited to 200 participants. (But this limit does not apply to non-pre-assigned breakout rooms.)

Only Allow Authenticated Users into Your Meeting

In the Meeting Options for the meeting, be sure to enable Only authenticated users can join and select Cornell Users from the dropdown. This will require session attendees to be authenticated with a address to join the meeting.

For Recurring Meetings, Trying to Edit a Single Occurrence to Add Pre-Assignments Will Not Work

When editing a recurring meeting to add breakout room pre-assignments, you must make the change to all recurrences of the meeting, or the change will not be saved. (In the Edit Meeting dialog, after clicking Edit This Meeting, click All to add pre-assignments.)

When breakout room assignments are different for each meeting recurrence, it may require instructors (hosts and co-hosts) to upload the new assignments each time after the previous occurrence and before the next occurrence.

Working with Breakout Rooms During Meetings

Starting Breakout Rooms During a Meeting

To launch breakout rooms during a meeting, click Breakout Rooms in the host control bar. If not all attendees are successfully pre-assigned, the host can click Recreate, then Recover to Pre-Assigned Rooms. Doing this works like the Refresh button in a browser.

Assigning Late Students to Breakout Rooms

When students / participants join a meeting after breakout rooms have been opened, late participants will need to be manually assigned to breakout rooms.

Changing Breakout Room Assignments During a Meeting

Once a meeting has begun, the breakout room pre-assignments cannot be changed through the web portal. To do this, the meeting can be ended, pre-assignments updated through the web portal, and then the meeting can be restarted. Alternatively, instructors can click Breakout Rooms, click the Recreate button, and use Recreate All Rooms. Note that when recreating breakout rooms automatically, students will be randomly assigned to breakout rooms.

Considerations for attendees (students)

Have Students Join Using Canvas

For meetings initiated in Canvas, instructors should tell students to access the Zoom meetings through Canvas.

Student Attendee Sign-in

When accessing a Zoom meeting through Canvas, after clicking Join, students will be prompted to sign in. Students should sign in with their Cornell NetID and password via either the Cornell Zoom website or the Zoom desktop client’s Sign In with SSO option.

When signing into Zoom using the client’s Single Sign On button, they should type cornell in the Company Domain field (if it is not already filled in correctly) to be properly authenticated and allocated to the correct pre-assigned room.


Transitioning Zoom Accounts Incorrectly Created Outside Cornell’s Zoom Account

Students using accounts they have created using their Cornell email address through instead of need to transfer their account to Cornell’s Zoom service by following the procedure at Switch Zoom Account from to  

Zoom Learning Center: Breakout Room Pre-Assign


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