In this paper, we use a combination of the technology acceptance model (TAM) and the literature on change management to develop and test a model predicting user acceptance of a new Web-based information system, the use of which is non-voluntary. Arguing that a non-voluntary system which transitions traditional processes to the Web constitutes an instance of a process change, we examine the role played by various change-enabling factors as well as change-motivating factors in user acceptance of the system. We find that the change enablers predict perceived ease of use, whereas the change motivators predict perceived usefulness of the system. Perceived usefulness and ease of use predict attitude toward the system, which in turn predicts behavioral intention to use the system, which predicts use of the system.