ContributionsMost RecentMost LikesSolutionsRe: The email address you are registering with is already in use Thanks for the feedback. We have talked to the participants and tested during the presentation itself. Our team was able to log in and join more than 5 times. The participants who have this problem, according to them, have only tried to log in once or twice. We also tried to join several times with the same name and e-mail address in several browsers at the same time. Our staff had no problem here. Is it possible that there is another problem? If it was only 1 participant, it could have been due to his limited IT knowledge. Unfortunately, there were 3-4 people in each of our presentations who had the problem (maybe the same participants). Thanks again! The email address you are registering with is already in use Hello community, we had an event with several speakers and many spectators. Some audience members have complained that the error message "The email address you are registering with is already in use" appears and they cannot attend the talk. There is a webinar setting where you can specify that you can only log in 1 time per user. However, we did not use this setting. How does this error occur? I am happy about any hint. Many thanks, Chris Solved