The purpose of this study was to evaluate an online professional development course for inservice teachers in the area of information and communication technology (ICT) and concurrently explore the factors that influence online professional development. The study integrated quantitative and qualitative methods including survey, focus group and interview, and was conducted during the progress of the course and approximately nine months after the course was over. Data show that the online delivery of ICT professional development for inservice teachers was successful. However, a learning community was difficult to initiate in an online learning environment. Teacher participants experienced great challenges when applying what they learned from the course into their teaching. The study suggests that further online ICT professional development should incorporate face-to-face sessions and enrol more than one teacher from the same school. Professional development aiming at changes should be considered as an ongoing process and supported with school change.