A considerable problem with OWA is calendar reminders not being "in your face" enough. The badging and the notification sound isn't enough. Me and my colleagues who use OWA have missed several meetings because of this.
Unlike Outlook client which presents a modal reminder dialog which a user must respond to.
OWA should utilize browser notification capability to do the same or provide a config for users to specify JS alerts appear for reminders, which would ensure they see them and must respond.
- Edited by MikeBrophy 14 hours 17 minutes ago