The brand behavior of employees is an important driver of brand success. In this regard, external communications which are perceived by employees to be of high quality represent a crucial determinant of employees’ brand behavior. However, the nature and dimensions of the so-called quality of external communications construct is still unclear. The present paper addresses this research gap. The aim is to develop a measurement instrument for quality of external communications and to examine its effect on employee brand behavior. The empirical findings show that quality of external communications comprises the following six dimensions: timing, target group-specificity, distinguishability, accurate presentation of employees, comprehensibility, and appropriate expenses. In addition, the findings report that quality of external communications positively affects – via brand identification – employees’ brand behavior.