The current work validated the decomposed theory of planned behaviour (DTPB) with working adults to assess its ability to predict intentions to participate in microlearning and also identify the significant factors that drive microlearning usage decisions. We found that positive attitudes towards microlearning (Attitude), stronger beliefs in others' opinions regarding microlearning use (SN), and stronger perceptions about one's capability to engage in microlearning (PBC), are associated with stronger intentions to participate in microlearning. All decomposed constructs were found to be significant predictors of the respective factors, except superior influence (SI) and resource facilitating conditions. We discuss potential targeted interventions focused on what works best to encourage microlearning adoption. For instance, while reporting superiors have no significant influence over one's microlearning use decisions, the opinions of peers and colleagues positively influence microlearning use. Hence, focusing on embedding community‐related aspects into a microlearning design may effectively encourage the use of microlearning.