We extend prior work by disentangling the effects of 2 aspects of diversity management—numerical diversity and authenticity of efforts—that may contribute to people's perceptions and behavior. Using a 2 (Demographic Heterogeneity) × 2 (Projected Diversity Image) factorial design, Studies 1 and 2 revealed significant interactions suggesting that both demographic diversity and authentic attention to diversity management are necessary to create a reputation for genuine commitment to diversity that may protect organizations from perceptions of discrimination. The third study examined the effect of diversity management authenticity on insider employee interpersonal behaviors. Study 3 revealed that individuals enacted more interpersonal helping behaviors toward newcomers in more authentic organizations. Together, these studies examine authenticity from both inside and outside the company.