It is compulsory for users to manually key in all participants for a meeting. This would be extremely inconvenient for users if there are multiple participants in that are required to join the meeting. Perhaps would be better for the programme to automatically add all contacts in a module to the meeting to prevent users from having to key in all participants of a module if everyone is required to attend the meeting.
If users wish to only add in certain participants, then allow for adding of specific participants to join the meeting.

It is compulsory for users to manually key in all participants for a meeting. This would be extremely inconvenient for users if there are multiple participants in that are required to join the meeting. Perhaps would be better for the programme to automatically add all contacts in a module to the meeting to prevent users from having to key in all participants of a module if everyone is required to attend the meeting.
If users wish to only add in certain participants, then allow for adding of specific participants to join the meeting.