Make an Appointment or Meeting Private
1.  Create or open the appointment or meeting that you want to make private.
2. On the Appointment tab, in the Options group, click Private.

Important: You should not rely on the Private feature to prevent other people from accessing the details of your appointments, contacts, or tasks. To ensure that other people cannot read the items that you mark as private, do not grant them Read permission to your Calendar, Contacts, or Tasks folders. A person with Read permission to access your folders could use programmatic methods or other e-mail applications to view the details of your private items. Use Private only when you share folders with people whom you trust.

Propose a New Time for a Meeting

1. In the open meeting request, on the Message tab, in the Respond group, click “Propose New Time”.
*Note: If you open the meeting from your calendar, on the Appointment tab, in the Respond group, click Propose New Time.
2. Click either Tentative and Propose New Time or Decline and Propose New Time.
3. Click a time when all invitees are available.
4. Click Propose Time.
5. Click Send.
Microsoft Office Outlook 2007 sends a default message saying that you want to propose a new time but you have tentatively accepted the meeting. You can change this default message to say that you want to propose a new time, and that you are declining the meeting:

1. On the Tools menu, click Options, and then click Calendar Options.
2. In the Use this response when you propose new meeting times list, click the setting that you want.

*Note: You can also change this setting for individual meetings. In the open meeting request, on the Message tab, in the Respond group, click either Tentative and Propose New Time or Decline and Propose New Time. If you open the meeting on your calendar, on the Appointment tab, in the Respond group, click either Tentative and Propose New Time or Decline and Propose New Time.