| Option | Description |
| Delivery Report | Select when you want to receive a report about your message. Only on failure is the default. |
| Delivery Priority | Select the priority of your message. |
| Return receipt | Select if you want a receipt telling you when your message has been opened. |
| I do not want to receive replies from participants | Select this to send the invitation as a broadcast message. This gives recipients the option of adding it to their Calendars without prompting them to send an answer back to you. |
| Prevent counter-proposing | Select this to prevent recipients from proposing different start or due dates for the invitation. |
| Prevent delegating | Select this to prevent recipients from sending the invitation to someone else to answer. |
| Sign | Select this to add a digital signature to the invitation so that recipients are sure you are the person who sent it. |
| Encrypt | Select this to encrypt the invitation so that only the intended recipients can read it. |