In technology acceptance literature, few have studied end users' post-adoption attitude of technologies within organizational contexts before end-users start using the technology-the pre-implementation stage. This research proposes that perceived usefulness, appropriateness, and perceived behavioral control have influences on post-adoption attitudes toward web based content management systems. The proposed model was empirically tested using the Partial Least Squares technique with the 148 web based content management system end-users' data collected from a large organization in a field setting. As theorized, all three variables were found to be significant determinants of system users' post-adoption attitude in the pre-implementation stage. Furthermore, appropriateness was found to be the strongest determinant of systems users' post-adoption attitude. The study findings provide important insights on enhancing system users' post-adoption attitude in the pre-implementation stage.