The Use Voting Buttons option is already selected by default within this dialog box, but the voting options are set to Approve;Reject.

If you select "Custom," the Message Options dialog box appears and you can enter your voting button names in the "Use Voting Buttons" text field under Voting and Tracking Options.

In the New Email window, click the Options tab. In the Tracking group, click Use Voting Button drop-down arrow. The Use Voting Button is a feature in Outlook that adds a voting button to the message.

The Use Voting Buttons option is already selected by default within this dialog box, but the voting options are set to Approve;Reject.