Why the setting has to be turned on beforehand
Breakout rooms are an account-level feature that has to be explicitly enabled in the web portal before it shows up as an option inside an actual meeting -- if the toolbar button is missing, this setting, rather than something in the meeting itself, is almost always the reason.
Manual, automatic, or self-select assignment
Automatic assignment is fastest for large, unstructured groups; manual assignment suits situations where specific people need to be grouped together, like mixing skill levels; and letting participants pick their own room works well for optional, interest-based breakouts.
Frequently Asked Questions
Can I change room assignments after the rooms are already open?
Yes -- the host can still move participants between open rooms, and participants themselves can sometimes switch rooms if "Allow participants to choose room" was enabled beforehand.
Do breakout room conversations get recorded if I am recording the main meeting?
Cloud recording generally only captures the main room by default. Recording an individual breakout room typically requires a participant in that specific room to start a local recording, if the host has allowed it.