Syncronisation with 2 users

Hi, I just download the eM Client and when I use the calender with the same e-mail adress as my co-worker, I do not receive his modification even if I refresh the caldender but he receives mine. How can we both modifie de schedule?
thank you

What calendar provider are you using?

We had this issue in version 7 where some user’s Google Calendars were not updating in this very same way. Going to the Calendar section of eM Client and unticking then reticking the affected calendar sometimes forced the sync when refresh or a restart didn’t. It’s not a practical solution, but maybe this is something similar.