This guide should get you the info you need on Preferred Names. You'll need to go into each student to remove the preferred name if that is what's decided.
At the Start Page, click on MBA Alert Creator
Click on Alerts Report
Go to Custom Alerts
Scroll down to Preferred Name and place a checkmark in the box.
Look down at the bottom of the page and you'll see the students that have a Preferred Name Alert. Click the Make Current Selection Button.
Click OK
Scroll back up to the top of the page and click the breadcrumb link for Start Page.
All the students with this alert will be your Current Selection. You can go through them and remove the alert.