What happens in a meeting: functionality for participants

Can participants record the meeting?

No, participants do not have permission to register a meeting (unless the host agrees to it). NB: the participants also see the command "Record", but if they try to use it a message warns that that they are not allowed to record.

Is a participant allowed to share a document?

Yes, every participant can do it, by clicking  on "Share screen" (the green command on the bottom bar) and select the document you want to share.