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.
You can upload the ICS file to Public Resources, if you wish that to be publically available. Otherwise you can store them in a 3rd party repository like sFTP and use the delivery to add it as an attachment.