Save the updated info (File Save) and not use "Send update" button. Hi everyone, I am not normally an Office 365 Administrator but find myself wearing that hat at a startup.After the meeting takes place I want to go back and add notes to that meeting. If I do this, I have to save and send updates to everyone. It is possible to add people and rooms to your Outlook reservation without resending the invitation to people who have already received it earlier. Yes, a meeting can be made in outlook without notifying the participants. You create the meeting, add the attendee's then click save, not send. We want you to understand how we handle your personal information. We also want you to know your rights and choices.