If the meeting was created before someone was added to BoardPro, they will not automatically appear in the meeting attendees list—here is how to add them.
Check that they have been added to BoardPro on the People List page. If they are not on the list, add them. See Adding People into BoardPro
Once added to the People List, you can add them as attendees to the meeting. On the Meeting Details page, you will see a box called "Add from People List." You can just select the name you need to add. They will now appear on the agenda.
Note: If you have already published the agenda, you must republish it so their names appear on the agenda and/or the minutes.
If everyone has been added from your People List, a box will open with the options to add a person as a guest to the agenda or add them to your organization.