Is there going to be a response or update here? I work for an MSP supporting customers and I am doing my best to stop customers from updating but this is spreading and users are very frustrated. I'm having to deal with this personally as well. I have totally uninstalled and deleted everything Microsoft and re-installed and setup with same result. I really dont want to wipe Mac because i dont think that will fix. I'm on beta Outlook running Exchange 2016.