I'm hoping someone can help me understand how delivery indicators are calculated.  When i look at the estimation of the number of recipients who have opened the emails ([indicators/@estimatedRecipientOpen]) i see a number that is different my individual count when i sum the individual recipients who...

Has anyone added a calendar invite fora meeting or as an appointment reminder to an email campaign delivery?  I haven't seen this done am not sure if there is an easy / standard way to accomplish this with HTML / JS.  Any help would be much appreciated.