1. In Configuration, click Attributes
  2. Select the type of attribute
  3. Mark the Unique checkbox for the Attribute in question

Unique checkbox


With the Unique checkbox marked the Attribute can only be added to each record only one time. For example, you can limit the attribute Spouse Name to one instance per faculty/staff record.
 

For more information, refer to How to add attributes (BB129311) or review the Configuration Guide for Admissions Office (PDF) or Configuration Guide for Registrar's Office (PDF)