A Guest Type identifies the status of the guest. Optional Invited but not required. CC Not invited but gets a copy of the proposal and can choose to display the meeting on their calendar. BCC Not invited but gets a copy of the meeting proposal. Other guests can not see that this person has been sent a copy of the meeting invitation.
Guest receives meetingmaker proposal via e-mail.
Contact without e-mail Guest invited to meeting but will not receive any invitation from meetingmaker.