We have an application that sends a confirmation email for an appointment that is specific to the recipient. We wish to have a button (pic attached) that will add the details into their calendar.
I provide the following information as reference material.
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This is a link that explains ics files: [url removed, login to view]
We need to know what information to send in the file that can enter the details and a specified category that the recipient may not have in their calendar into their calendar.